Longest word in English - wikipedia Longest word in English Not to be confused with Longest words. The identity of the longest word in English depends upon the definition of what constitutes a word in the English language, as well as how length should be compared. In addition to words derived naturally from the language 's roots ( without any known intentional invention ), English allows new words to be formed by coinage and construction ; place names may be considered words ; technical terms may be arbitrarily long. Length may be understood in terms of orthography and number of written letters, or ( less commonly ) phonology and the number of phonemes. Word Letters Characteristics Dispute Methionylthreonylthreonylglutaminylalanyl... isoleucine 189,819 Chemical name of titin, the largest known protein Technical ; not in dictionary ; disputed whether it is a word Methionylglutaminylarginyltyrosylglutamyl... serine 1,909 Longest published word Technical Lopadotemachoselachogaleokranioleipsano... pterygon 182 Longest word coined by a major author, the longest word ever to appear in literature Coined ; not in dictionary ; Ancient Greek transliteration Pneumonoultramicroscopicsilicovolcanoconiosis 45 Longest word in a major dictionary Technical ; coined to be the longest word Supercalifragilisticexpialidocious 34 Made popular in the Mary Poppins film and musical Coined Pseudopseudohypoparathyroidism 30 Longest non-coined word in a major dictionary Technical Floccinaucinihilipilification 29 Longest unchallenged nontechnical word Coined Antidisestablishmentarianism 28 Longest non-coined and nontechnical word Honorificabilitudinitatibus 27 Longest word in Shakespeare 's works ; longest word in the English language featuring alternating consonants and vowels Latin Contents 1 Major dictionaries 2 Creations of long words 2.1 Coinages 2.2 Agglutinative constructions 2.3 Technical terms 3 Notable long words 3.1 Place names 3.2 Personal names 3.3 Words with certain characteristics of notable length 3.3. 1 Typed words 4 See also 5 References 6 External links Major dictionaries The longest word in any of the major English language dictionaries is pneumonoultramicroscopicsilicovolcanoconiosis, a word that refers to a lung disease contracted from the inhalation of very fine silica particles, specifically from a volcano ; medically, it is the same as silicosis. The word was deliberately coined to be the longest word in English, and has since been used in a close approximation of its originally intended meaning, lending at least some degree of validity to its claim. The Oxford English Dictionary contains pseudopseudohypoparathyroidism ( 30 letters ). Merriam - Webster 's Collegiate Dictionary does not contain antidisestablishmentarianism ( 28 letters ), as the editors found no widespread, sustained usage of the word in its original meaning. The longest word in that dictionary is electroencephalographically ( 27 letters ). The longest non-technical word in major dictionaries is floccinaucinihilipilification at 29 letters. Consisting of a series of Latin words meaning `` nothing '' and defined as `` the act of estimating something as worthless '' ; its usage has been recorded as far back as 1741. Ross Eckler has noted that most of the longest English words are not likely to occur in general text, meaning non-technical present - day text seen by casual readers, in which the author did not specifically intend to use an unusually long word. According to Eckler, the longest words likely to be encountered in general text are deinstitutionalization and counterrevolutionaries, with 22 letters each. A computer study of over a million samples of normal English prose found that the longest word one is likely to encounter on an everyday basis is uncharacteristically, at 20 letters. The word internationalization is abbreviated `` i18n '', the embedded number representing the number of letters between the first and the last. Creations of long words Coinages In his play Assemblywomen ( Ecclesiazousae ), the ancient Greek comedic playwright Aristophanes created a word of 171 letters ( 183 in the transliteration below ), which describes a dish by stringing together its ingredients : Lopadotemachoselachogaleokranioleipsanodrimhypotrimmatosilphioparaomelitokatakechymenokichlepikossyphophattoperisteralektryonoptekephalliokigklopeleiolagoiosiraiobaphetraganopterygon. Henry Carey 's farce Chrononhotonthologos ( 1743 ) holds the opening line : `` Aldiborontiphoscophornio ! Where left you Chrononhotonthologos ? '' Thomas Love Peacock put these creations into the mouth of the phrenologist Mr. Cranium in his 1816 romp Headlong Hall : osteosarchaematosplanchnochondroneuromuelous ( 44 characters ) and osseocarnisanguineoviscericartilaginonervomedullary ( 51 characters ). James Joyce made up nine 100 - letter words plus one 101 - letter word in his novel Finnegans Wake, the most famous of which is Bababadalgharaghtakamminarronnkonnbronntonnerronntuonnthunntrovarrhounawnskawntoohoohoordenenthurnuk. Appearing on the first page, it allegedly represents the symbolic thunderclap associated with the fall of Adam and Eve. As it appears nowhere else except in reference to this passage, it is generally not accepted as a real word. Sylvia Plath made mention of it in her semi-autobiographical novel The Bell Jar, when the protagonist was reading Finnegans Wake. `` Supercalifragilisticexpialidocious '', the 34 - letter title of a song from the movie Mary Poppins, does appear in several dictionaries, but only as a proper noun defined in reference to the song title. The attributed meaning is `` a word that you say when you do n't know what to say. '' The idea and invention of the word is credited to songwriters Robert and Richard Sherman. Agglutinative constructions The English language permits the legitimate extension of existing words to serve new purposes by the addition of prefixes and suffixes. This is sometimes referred to as agglutinative construction. This process can create arbitrarily long words : for example, the prefixes pseudo ( false, spurious ) and anti ( against, opposed to ) can be added as many times as desired. A word like anti-aircraft ( pertaining to the defense against aircraft ) is easily extended to anti-anti - aircraft ( pertaining to counteracting the defense against aircraft, a legitimate concept ) and can from there be prefixed with an endless stream of `` anti - '' s, each time creating a new level of counteraction. More familiarly, the addition of numerous `` great '' s to a relative, e.g. great - great - great - grandfather, can produce words of arbitrary length. In musical notation, a 8192nd note may be called a semihemidemisemihemidemisemihemidemisemiquaver. Antidisestablishmentarianism is the longest common example of a word formed by agglutinative construction. Technical terms Parastratiosphecomyia sphecomyioides A number of scientific naming schemes can be used to generate arbitrarily long words. The IUPAC nomenclature for organic chemical compounds is open - ended, giving rise to the 189,819 - letter chemical name Methionylthreonylthreonyl... isoleucine for the protein also known as titin, which is involved in striated muscle formation. In nature, DNA molecules can be much bigger than protein molecules and therefore potentially be referred to with much longer chemical names. For example, the wheat chromosome 3B contains almost 1 billion base pairs, so the sequence of one of its strands, if written out in full like Adenilyladenilylguanilylcystidylthymidyl..., would be about 8 billion letters long. The longest published word, Acetylseryltyrosylseryliso... serine, referring to the coat protein of a certain strain of tobacco mosaic virus, was 1,185 letters long, and appeared in the American Chemical Society 's Chemical Abstracts Service in 1964 and 1966. In 1965, the Chemical Abstracts Service overhauled its naming system and started discouraging excessively long names. John Horton Conway and Landon Curt Noll developed an open - ended system for naming powers of 10, in which one sexmilliaquingentsexagintillion, coming from the Latin name for 6560, is the name for 10 = 10. Under the long number scale, it would be 10 = 10. Jonathan Bowers has developed a system for even larger numbers ( enneenneconteennahecteika - enneenneconteennahectenedaka - enneenneconteennahecteyodaka - enneenneconteennahectezedaka - enneenneconteennahecteexdaka - enneenneconteennahectepedaka - enneennecontehectetedaka - enneenneconteennahectetradaka - enneenneconteennahectedoka - enneenneconteennahectehendaka - enneenneconteennahectedaka - enneenneconteennahectexenna - enneenneconteennahecteyotta - enneenneconteennahectezetta - enneenneconteennahecteexa - enneenneconteennahectepeta - enneenneconteennahectetera - enneenneconteennahectegiga - enneenneconteennahectemega - enneenneconteennahectekilla - enneenneconteennahectillion for 10 3 ∗ 10 3 ∗ 10 63 − 3 + 3 ( displaystyle 10 ^ ( 3 * 10 ^ ( 3 * 10 ^ ( 63 ) - 3 ) + 3 ) ) ). Gammaracanthuskytodermogammarus loricatobaicalensis is sometimes cited as the longest binomial name -- it is a kind of amphipod. However, this name, proposed by B. Dybowski, was invalidated by the International Code of Zoological Nomenclature in 1929 after being petitioned by Mary J. Rathbun to take up the case. Parastratiosphecomyia stratiosphecomyioides is the longest accepted binomial name. It is a species of soldier fly. Aequeosalinocalcalinoceraceoaluminosocupreovitriolic, at 52 letters, describing the spa waters at Bath, England, is attributed to Dr. Edward Strother ( 1675 -- 1737 ). The word is composed of the following elements : Aequeo : equal ( Latin, aequo ) Salino : containing salt ( Latin, salinus ) Calcalino : calcium ( Latin, calx ) Ceraceo : waxy ( Latin, cera ) Aluminoso : alumina ( Latin ) Cupreo : from `` copper '' Vitriolic : resembling vitriol Notable long words Place names The sign at Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu The station sign at Llanfairpwllgwyngyllgogerychwyrndrobwllllantysiliogogogoch in North Wales Main article : List of long place names The longest officially recognized place name in an English - speaking country is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu ( 57 letters ), which is a hill in New Zealand. The name is in the Māori language. A longer and widely recognised version of the name is Taumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwhenuakitanatahu ( 85 letters ), which appears on the signpost at the location ( see the photo on this page ). In Māori, the digraphs ng and wh are each treated as single letters. In Canada, the longest place name is Dysart, Dudley, Harcourt, Guilford, Harburn, Bruton, Havelock, Eyre and Clyde, a township in Ontario, at 61 letters or 68 non-space characters. The longest non-contrived place name in the United Kingdom which is a single non-hyphenated word is Cottonshopeburnfoot ( 19 letters ) and the longest which is hyphenated is Sutton - under - Whitestonecliffe ( 29 characters ). The longest place name in the United States ( 45 letters ) is Chargoggagoggmanchauggagoggchaubunagungamaugg, a lake in Webster, Massachusetts. It means `` Fishing Place at the Boundaries -- Neutral Meeting Grounds '' and is sometimes facetiously translated as `` you fish your side of the water, I fish my side of the water, nobody fishes the middle ''. The lake is also known as Webster Lake. The longest hyphenated names in the U.S. are Winchester - on - the - Severn, a town in Maryland, and Washington - on - the - Brazos, a notable place in Texas history. The longest official geographical name in Australia is Mamungkukumpurangkuntjunya. It has 26 letters and is a Pitjantjatjara word meaning `` where the Devil urinates ''. In Ireland, the longest English placename at 19 letters is Newtownmountkennedy in County Wicklow. See also : List of short place names Personal names Guinness World Records formerly contained a category for longest personal name used. From about 1975 to 1985, the recordholder was Adolph Blaine Charles David Earl Frederick Gerald Hubert Irvin John Kenneth Lloyd Martin Nero Oliver Paul Quincy Randolph Sherman Thomas Uncas Victor William Xerxes Yancy Zeus Wolfeschlegelsteinhausenbergerdorffvoralternwarengewissenhaftschaferswessenschafewarenwohlgepflegeundsorgfaltigkeitbeschutzenvonangreifendurchihrraubgierigfeindewelchevoralternzwolftausendjahresvorandieerscheinenwanderersteerdemenschderraumschiffgebrauchlichtalsseinursprungvonkraftgestartseinlangefahrthinzwischensternartigraumaufdersuchenachdiesternwelchegehabtbewohnbarplanetenkreisedrehensichundwohinderneurassevonverstandigmenschlichkeitkonntefortplanzenundsicherfreuenanlebenslanglichfreudeundruhemitnichteinfurcht vorangreifenvonandererintelligentgeschopfsvonhinzwischensternartigraum, Senior ( 746 letters ), also known as Wolfe + 585, Senior. After 1985 Guinness briefly awarded the record to a newborn girl with a longer name. The category was removed shortly afterward. Long birth names are often coined in protest of naming laws or for other personal reasons. The naming law in Sweden was challenged by parents Lasse Diding and Elisabeth Hallin, who proposed the given name `` Brfxxccxxmnpcccclllmmnprxvclmnckssqlbb11116 '' for their child ( pronounced ( ˈalbɪn ), 43 characters ), which was rejected by a district court in Halmstad, southern Sweden. Words with certain characteristics of notable length This section possibly contains original research. Please improve it by verifying the claims made and adding inline citations. Statements consisting only of original research should be removed. ( August 2017 ) Main article : List of the longest English words with one syllable Schmaltzed and strengthed ( 10 letters ) appear to be the longest monosyllabic words recorded in The Oxford English Dictionary, while scraunched and scroonched appear to be the longest monosyllabic words recorded in Webster 's Third New International Dictionary ; but squirrelled ( 11 letters ) is the longest if pronounced as one syllable only ( as permitted in The Shorter Oxford English Dictionary and Merriam - Webster Online Dictionary at squirrel, and in Longman Pronunciation Dictionary ). Schtroumpfed ( 12 letters ) was coined by Umberto Eco, while broughammed ( 11 letters ) was coined by William Harmon after broughamed ( 10 letters ) was coined by George Bernard Shaw. Strengths is the longest word in the English language containing only one vowel. Euouae, a medieval musical term, is the longest English word consisting only of vowels, and the word with the most consecutive vowels. However, the `` word '' itself is simply a mnemonic consisting of the vowels to be sung in the phrase `` seculorum Amen '' at the end of the lesser doxology. ( Although u was often used interchangeably with v, and the variant `` Evovae '' is occasionally used, the v in these cases would still be a vowel. ) The longest words with no repeated letters are dermatoglyphics, misconjugatedly and uncopyrightables. The longest word whose letters are in alphabetical order is the eight - letter Aegilops, a grass genus. However, this is arguably both Latin and a proper noun. There are several six - letter English words with their letters in alphabetical order, including abhors, almost, begins, biopsy, chimps and chintz. The longest words recorded in OED with each vowel only once, and in order, are abstemiously, affectiously, and tragediously ( OED ). Fracedinously and gravedinously ( constructed from adjectives in OED ) have thirteen letters ; Gadspreciously, constructed from Gadsprecious ( in OED ), has fourteen letters. Facetiously is among the few other words directly attested in OED with single occurrences of all five vowels and the semivowel y. The longest single palindromic word in English is rotavator, another name for a rotary tiller for breaking and aerating soil. Typed words The longest words typable with only the left hand using conventional hand placement on a QWERTY keyboard are tesseradecades, aftercataracts, and the more common but sometimes hyphenated sweaterdresses. Using the right hand alone, the longest word that can be typed is johnny - jump - up, or, excluding hyphens, monimolimnion and phyllophyllin. The longest English word typable using only the top row of letters has 11 letters : rupturewort. Similar words with 10 letters include : pepperwort, perpetuity, proprietor, requietory, repertoire, tripertite, pourriture and ( fittingly ) typewriter. The word teetertotter ( used in North American English ) is longer at 12 letters, although it is usually spelled with a hyphen. The longest using only the middle row is shakalshas ( 10 letters ). Nine - letter words include flagfalls, galahads and alfalfas. Since the bottom row contains no vowels, no standard words can be formed. Exceptions might include Zzz, seen in some dictionaries to denote sleep, or m ', the clitic form of my. The longest words typable by alternating left and right hands are antiskepticism and leucocytozoans respectively. On a Dvorak keyboard, the longest `` left - handed '' words are epopoeia, jipijapa, peekapoo, and quiaquia. Other such long words are papaya, Kikuyu, opaque, and upkeep. Kikuyu is typed entirely with the index finger, and so the longest one - fingered word on the Dvorak keyboard. There are no vowels on the right - hand side, and so the longest `` right - handed '' word is crwth. See also Donaudampfschiffahrtselektrizitätenhauptbetriebswerkbauunterbeamtengesellschaft, longest published word in German Lipogram List of the longest English words with one syllable Longest English sentence Longest word in Spanish Longest word in Turkish Number of words in English Scriptio continua Sesquipedalianism References Jump up ^ Colista Moore ( 2011 ). Student 's Dictionary. p. 524. ISBN 978 - 1 - 934669 - 21 - 1. Jump up ^ see separate article Lopado... pterygon Jump up ^ Donald McFarlan ; Norris Dewar McWhirter ; David A. Boeh ( 1989 ). Guinness book of world records : 1990. Sterling. p. 129. ISBN 978 - 0 - 8069 - 5790 - 6. ^ Jump up to : Coined around 1935 to be the longest word ; press reports on puzzle league members legitimized it somewhat. First appeared in the MWNID supplement, 1939. Today OED and several others list it, but citations are almost always as `` longest word ''. More detail at pneumonoultramicroscopicsilicovolcanoconiosis. Jump up ^ `` What is the longest English word ? ''. AskOxford. Archived from the original on 2012 - 04 - 12. Retrieved 2010 - 08 - 22. Jump up ^ `` What is the longest English word ? ''. oxforddictionaries.com. Jump up ^ http://www.innocentenglish.com/cool-interesting-and-strange-facts/cool-strange-and-interesting-facts-page-3-3.html See fact # 99 Jump up ^ `` pneumonoultramicroscopicsilicovolcanoconiosis -- definition of pneumonoultramicroscopicsilicovolcanoconiosis in English from the Oxford dictionary ''. oxforddictionaries.com. Jump up ^ `` The Longest Word in the Dictionary '' ( Video ). Ask the Editor. Merriam - Webster. Retrieved 14 November 2013. Jump up ^ `` Floccinaucinihilipilification '' by Michael Quinion World Wide Words ; Jump up ^ The Guinness Book of Records, in its 1992 and previous editions, declared the longest real word in the English language to be floccinaucinihilipilification. More recent editions of the book have acknowledged pneumonoultramicroscopicsilicovolcanoconiosis. What is the longest English word ? - Oxford Dictionaries Online Jump up ^ In recent times its usage has been recorded in the proceedings of the United States Senate by Senator Robert Byrd Discussion between Sen. Moynihan and Sen. Byrd `` Mr. President, may I say to the distinguished Senator from New York, I used that word on the Senate floor myself 2 or 3 years ago. I can not remember just when or what the occasion was, but I used it on that occasion to indicate that whatever it was I was discussing it was something like a mere trifle or nothing really being of moment. '' Congressional Record June 17, 1991, p. S7887, and at the White House by Bill Clinton 's press secretary Mike McCurry, albeit sarcastically. December 6, 1995, White House Press Briefing in discussing Congressional Budget Office estimates and assumptions : `` But if you -- as a practical matter of estimating the economy, the difference is not great. There 's a little bit of floccinaucinihilipilification going on here. '' Jump up ^ Eckler, R. Making the Alphabet Dance, p 252, 1996. Jump up ^ `` Longest Common Words -- Modern ''. Maltron.com. Archived from the original on 27 April 2009. Retrieved 2010 - 08 - 22. Jump up ^ `` Glossary of W3C Jargon ''. World Wide Web Consortium. Retrieved 2008 - 10 - 13. Jump up ^ `` Origin of the Abbreviation I18n ''. Jump up ^ `` Localization vs. Internationalization ''. World Wide Web Consortium. Jump up ^ Paux et al. ( 2008 ) Science, Vol. 322 ( 5898 ) 101 - 104. A Physical Map of the 1 - Gigabase Bread Wheat Chromosome 3B ( 1 ) Jump up ^ Chemical Abstracts Formula Index, Jan. - June 1964, Page 967F ; Chemical Abstracts 7th Coll. Formulas, C H - Z, 56 - 65, 1962 -- 1966, Page 6717F Jump up ^ Sbiis Sabaian 's `` Large Numbers '' website Jump up ^ `` Opinion 105. Dybowski 's ( 1926 ) Names of Crustacea Suppressed ''. Opinions Rendered by the International Commission on Zoological Nomenclature : Opinions 105 to 114. Smithsonian Miscellaneous Collections. 73 ( 6 ). 1929. pp. 1 -- 3. hdl : 10088 / 23619. BHL page 8911139. Jump up ^ rjk. `` World 's longest name of an animal. Parastratiosphecomyia stratiosphecomyioides Stratiomyid Fly Soldier Fly ''. thelongestlistofthelongeststuffatthelongestdomainnameatlonglast.com. Jump up ^ cited in some editions of the Guinness Book of Records as the longest word in English, see Askoxford.com on the longest English word Archived April 12, 2012, at WebCite Jump up ^ ( 2 ) Jump up ^ `` GeoNames Government of Canada site ''. Archived from the original on 2009 - 02 - 06. Jump up ^ Belluck, Pam ( 2004 - 11 - 20 ). `` What 's the Name of That Lake ? It 's Hard to Say ''. The New York Times. Jump up ^ `` Geoscience Australia Gazeteer ''. Archived from the original on 2007 - 10 - 01. Jump up ^ `` South Australian State Gazeteer ''. Archived from the original on 2007 - 10 - 01. Jump up ^ `` Fun With Words : Word Oddities ''. Rinkworks.com. Retrieved 2010 - 08 - 22. ^ Jump up to : `` Typewriter Words ''. Questrel.com. Retrieved 2010 - 08 - 22. Jump up ^ `` Science Links Japan Two Unique Aftercataracts Requiring Surgical Removal ''. Sciencelinks.jp. 2009 - 03 - 18. Archived from the original on 2011 - 02 - 17. Retrieved 2010 - 08 - 22. Jump up ^ `` Dictionary entry for monimolimnion, a word that, at 13 letters, is longer than any of the words linked in the source above ''. Retrieved 2009 - 08 - 15. Jump up ^ `` Word Records ''. Fun-with-words.com. Retrieved 2012 - 08 - 13. Jump up ^ `` Typewriter Words ''. Wordnik.com. Retrieved 2011 - 01 - 15. Jump up ^ `` The Dvorak Keyboard and You ''. Theworldofstuff.com. Archived from the original on 2010 - 08 - 20. Retrieved 2010 - 08 - 22. External links Wiktionary has a category on Long English words Listen to this article ( info / dl ) This audio file was created from a revision of the article `` Longest word in English '' dated 2011 - 01 - 08, and does not reflect subsequent edits to the article. ( Audio help ) More spoken articles A Collection of Word Oddities and Trivia -- Long words Long words ( chemical names ) Long words ( place names ) What is the longest English word ?, AskOxford.com `` Ask the Experts '' What is the Longest Word ?, Fun-With-Words.com Full chemical name of titin. Taxonomy of Wordplay Retrieved from `` https://en.wikipedia.org/w/index.php?title=Longest_word_in_English&oldid=818685520 '' Categories : Superlatives Types of words English words Long words Hidden categories : Webarchive template webcite links All articles with dead external links Articles with dead external links from August 2010 Wikipedia pages semi-protected against vandalism Articles that may contain original research from August 2017 All articles that may contain original research Spoken articles Articles with hAudio microformats Talk View source Contents About Wikipedia Español Norsk Русский தமிழ் Tiếng Việt 中文 Edit links This page was last edited on 5 January 2018, at 00 : 10. 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Question: what is the longest english word in the dictionary
Answer: pneumonoultramicroscopicsilicovolcanoconiosis; Pneumonoultramicroscopicsilicovolcanoconiosis; Pneumonoultramicroscopicsilicovolcanoconiosis; Methionylglutaminylarginyltyrosylglutamyl...serine