Horology - wikipedia Horology This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. ( November 2011 ) Horology ( `` the study of time '', related to Latin horologium from Greek ὡρολόγιον, `` instrument for telling the hour '', from ὥρα hṓra `` hour ; time '' and - o - interfix and suffix - logy ) is the study of the measurement of time. Clocks, watches, clockwork, sundials, hourglasses, clepsydras, timers, time recorders, marine chronometers and atomic clocks are all examples of instruments used to measure time. In current usage, horology refers mainly to the study of mechanical time - keeping devices, while chronometry more broadly includes electronic devices that have largely supplanted mechanical clocks for the best accuracy and precision in time - keeping. People interested in horology are called horologists. That term is used both by people who deal professionally with timekeeping apparatus ( watchmakers, clockmakers ), as well as aficionados and scholars of horology. Horology and horologists have numerous organizations, both professional associations and more scholarly societies. The largest horological membership organisation globally is the NAWCC, the National Association of Watch and Clock Collectors, which is USA based, but also has local chapters elsewhere. Contents 1 Museums and libraries 2 Organizations 3 World exhibitions 4 Glossary 5 See also 6 References 7 Further reading Museums and libraries `` Universal Clock '' at the Clock Museum in Zacatlán, Puebla, Mexico There are many horology museums and several specialized libraries devoted to the subject. One example is the Royal Greenwich Observatory, which is also the source of the Prime Meridian ( longitude 0 ° 0 ' 0 `` ), and the home of the first marine timekeepers accurate enough to determine longitude ( made by John Harrison ). Other horological museums in the London area include the Clockmakers ' Museum, which re-opened at the Science Museum in October 2015, the horological collections at the British Museum, the Science Museum ( London ), and the Wallace Collection. One of the more comprehensive museums dedicated to horology is the Musée international d'horlogerie in La Chaux - de-Fonds ( Switzerland ). The Musée d'Horlogerie du Locle is smaller but located nearby. One of the better horological museums in Germany is the Deutsches Uhrenmuseum in Furtwangen im Schwarzwald, in the Black Forest. The two leading specialised horological museums in North America are the National Watch and Clock Museum in Columbia, Pennsylvania and the American Clock and Watch Museum in Bristol, Connecticut. The eastern French city of Besançon has the Musée du Temps ( Museum of Time ) in the historic Palais Grenvelle. An example of a museum devoted to one particular type of clock is the Cuckooland Museum in the UK, which hosts the world 's largest collection of antique cuckoo clocks. One of the most comprehensive horological libraries open to the public is the National Watch and Clock Library in Columbia, Pennsylvania. Other good horological libraries providing public access are at the Musée international d'horlogerie in Switzerland, at the Deutsches Uhrenmuseum in Germany, and at the Guildhall Library in London. Another museum dedicated to clocks is the Willard House and Clock Museum in Grafton, Massachusetts. Organizations Notable scholarly horological organizations include : American Watchmakers - Clockmakers Institute -- AWCI ( United States of America ) Antiquarian Horological Society -- AHS ( United Kingdom ) British Horological Institute -- BHI ( United Kingdom ) Chronometrophilia ( Switzerland ) Deutsche Gesellschaft für Chronometrie -- DGC ( Germany ) National Association of Watch and Clock Collectors -- NAWCC ( United States of America ) World exhibitions BaselWorld Geneva Time Exhibition Salon International de la Haute Horlogerie ( SIHH ) Glossary Term Explanation Chablon French term for a watch movement ( not including the dial and hands ), that is not completely assembled. Ébauche French term ( commonly used in English - speaking countries ) for a movement blank, i.e., an incomplete watch movement sold as a set of loose parts -- comprising the main plate, bridges, train, winding and setting mechanism, and regulator. The timing system, escapement, and mainspring, however, are not parts of the ébauche. Établissage French term for the method of manufacturing watches or movements by assembling their various components. It generally includes the following operations : receipt, inspection and stocking of the `` ébauche '', the regulating elements and the other parts of the movement and of the make - up ; assembling ; springing and timing ; fitting the dial and hands ; casing ; final inspection before packing and dispatching. Établisseur French term for a watch factory that assembles watches from components it buys from other suppliers. Factory, works In the Swiss watch industry, the term manufacture is used of a factory that manufacturers watches almost completely, as distinct from an atelier de terminage, which only assembles, times, and fits hands and casing. Manufacture d'horlogerie French term for a watch factory that produces components ( particularly the `` ébauche '' ) for its products ( watches, alarm and desk clocks, etc. ). Terminage French term denoting the process of assembling watch parts for the account of a producer. Termineur French term for an independent watchmaker ( or workshop ) engaged in assembling watches, either wholly or in part, for the account of an `` établisseur '' or a `` manufacture '', who supply the necessary loose parts. See `` atelier de terminage '' above. See also Complication ( horology ) Daylight saving time History of timekeeping devices Hora ( astrology ) ISO 8601 Kalachakra List of clock manufacturers List of watch manufacturers System time Winthrop Kellogg Edey References Jump up ^ `` horology ''. Online Etymology Dictionary. Jump up ^ ὡρολόγιον, ὥρα. Liddell, Henry George ; Scott, Robert ; A Greek -- English Lexicon at the Perseus Project. Further reading Look up horology in Wiktionary, the free dictionary. Wikimedia Commons has media related to Horology. Beckett, Edmund, A Rudimentary Treatise on Clocks, Watches and Bells, 1903, from Project Gutenberg Berner, G.A., Illustrated Professional Dictionary of Horology, Federation of the Swiss Watch Industry FH 1961 - 2012 Daniels, George, Watchmaking, London : Philip Wilson Publishers, 1981 ( reprinted June 15, 2011 ) Grafton, Edward, Horology, a popular sketch of clock and watch making, London : Aylett and Jones, 1849 Perman, Stacy, A Grand Complication : The Race to Build the World 's Most Legendary Watch, Atria Books ( Simon & Schuster ), February 2013. ISBN 9781439190081 Time Key concepts Past history deep time Present Future Futures studies Far future in religion Far future in science fiction and popular culture Timeline of the far future Eternity Eternity of the world Measurement and standards Chronometry UTC UT TAI Unit of time Planck time Second Minute Hour Day Week Month Season Year Decade Century Millennium Tropical year Sidereal year Samvatsara Measurement systems Time zone Six - hour clock 12 - hour clock 24 - hour clock Daylight saving time Solar time Sidereal time Metric time Decimal time Hexadecimal time Calendars Gregorian Julian Hebrew Islamic Lunar Solar Hijri Mayan Intercalation Leap second Leap year Clocks Horology History of timekeeping devices Main types astrarium atomic quantum hourglass marine sundial sundial markup schema watch mechanical stopwatch water - based Cuckoo clock Digital clock Grandfather clock Chronology History Astronomical chronology Big History Calendar era Chronicle Deep time Periodization Regnal year Timeline Religion Mythology Dreamtime Kāla Kalachakra Prophecy Time and fate deities Wheel of time Immortality Philosophy of time A-series and B - series B - theory of time Causality Duration Endurantism Eternal return Eternalism Event Multiple time dimensions Perdurantism Presentism Static interpretation of time Temporal finitism Temporal parts The Unreality of Time Human experience and use of time Accounting period Chronemics Fiscal year Generation time Mental chronometry Music Procrastination Punctuality Temporal database Term Time discipline Time management Time perception Specious present Time - tracking software Time - use research Time - based currency ( time banking ) Time value of money Time clock Timesheet Yesterday -- Today -- Tomorrow Time in Geology Geological time age chron eon epoch era period Geochronology Geological history of Earth Physics Absolute time and space Arrow of time Chronon Coordinate time Imaginary time Planck epoch Planck time Proper time Rate Spacetime Theory of relativity Time dilation gravitational Time domain Time translation symmetry Time reversal symmetry other subject areas Chronological dating Chronobiology Circadian rhythms Dating methodologies in archaeology Time geography Related topics Carpe diem Clock position Space System time Tempus fugit Time capsule Time complexity Time signature Time travel Time portal Time measurement and standards Chronometry Orders of magnitude Metrology International standards Coordinated Universal Time offset UT ΔT DUT1 International Earth Rotation and Reference Systems Service ISO 31 - 1 ISO 8601 International Atomic Time 6 - hour clock 12 - hour clock 24 - hour clock Barycentric Coordinate Time Barycentric Dynamical Time Civil time Daylight saving time Geocentric Coordinate Time International Date Line Leap second Solar time Terrestrial Time Time zone 180th meridian Obsolete standards Ephemeris time Greenwich Mean Time Prime meridian Time in physics Absolute space and time Spacetime Chronon Continuous signal Coordinate time Cosmological decade Discrete time and continuous time Planck time Proper time Theory of relativity Time dilation Gravitational time dilation Time domain Time translation symmetry T - symmetry Horology Clock Astrarium Atomic clock Complication History of timekeeping devices Hourglass Marine chronometer Marine sandglass Radio clock Watch stopwatch Water clock Sundial Dialing scales Equation of time History of sundials Sundial markup schema Calendar Astronomical Dominical letter Epact Equinox Gregorian Hebrew Hindu Intercalation Islamic Julian Leap year Lunar Lunisolar Solar Solstice Tropical year Weekday determination Weekday names Archaeology and geology Chronological dating Geologic time scale International Commission on Stratigraphy Astronomical chronology Galactic year Nuclear timescale Precession Sidereal time Other units of time Flick Shake Jiffy Second Minute Moment Hour Day Week Fortnight Month Year Olympiad Lustrum Decade Century Saeculum Millennium Related topics Chronology Duration music Mental chronometry Metric time System time Time value of money Timekeeper Christiaan Huygens Books Systema Saturnium ( 1659 ) De Vi Centrifiga ( 1659 ) Horologium Oscillatorium ( 1673 ) Traité de la Lumiére ( 1692 ) Cosmotheoros ( 1698 ) In science and natural philosophy Centripetal acceleration Coupled oscillation Conception of the standardization of the temperature scale Early history of classical mechanics Early history of calculus Huygens ' law Huygens ' lemniscate Huygens ' principle ( Huygens -- Fresnel principle ) Huygens ' construction Huygens ' tritone Huygens ' wavelet Huygens ' wave theory Huygens -- Steiner theorem Hypothesis of intelligent extraterrestrial life Isochrone curve ( tautochrone curve ) Foundations of differential geometry of curves ( mathematical notions of the evolute and involute of the curve ) Scientific foundations of horology Mathematical and physical investigations of properties of the pendulum Modern conception of centrifugal and centripetal forces Music theory of microtones ( 31 equal temperament ) Polarization of light ( Iceland spar ) Rings of Saturn Titan ( moon ) Theoretical foundations of wave optics ( wave theory of light ) In technology Inventions by Huygens Aerial telescope Centrifugal governor Cycloidal pendulum Huygens ' engine Huygens ' eyepiece Magic lantern Spiral balance spring Precision timekeeping ( pendulum clock and spiral - hairspring watch ) Recognitions List of things named after Christiaan Huygens 2801 Huygens Cassini -- Huygens Huygens probe Mons Huygens Huygens ( crater ) Huygens - Fokker Foundation Huygens Gap Huygens Ringlet Horologium ( constellation ) Other topics Cosmos : A Personal Voyage - Episode 6 : `` Travellers ' Tales '' ( 1980 documentary TV series by Carl Sagan ) Clocks and Culture, 1300 -- 1700 ( 1967 history book by Carlo Cipolla ) Revolution in Time : Clocks and the Making of the Modern World ( 1983 history book by David Landes ) Scientific Revolution Golden Age of Dutch science and technology Science and technology in the Dutch Republic Académie des Sciences Related people Huygens family Galileo Galilei René Descartes Salomon Coster Antonie van Leeuwenhoek Gottfried Wilhelm Leibniz Isaac Newton Robert Hooke Denis Papin Augustin - Jean Fresnel Thomas Young A rudimentary prototype of internal combustion piston engine. An early practical type of image projector and a precursor to both the modern slide projector and the movie projector. Wikiquote Wikisource texts Retrieved from `` https://en.wikipedia.org/w/index.php?title=Horology&oldid=865162970 '' Categories : Horology Timekeeping Hidden categories : Articles containing Ancient Greek - language text Articles needing additional references from November 2011 All articles needing additional references Talk Contents About Wikipedia Български Cymraeg Deutsch Español Français Italiano עברית Bahasa Melayu 日本 語 Norsk nynorsk Occitan Polski Português Русский Sicilianu Српски / srpski Suomi Svenska தமிழ் Українська اردو 粵語 14 more Edit links This page was last edited on 22 October 2018, at 04 : 51 ( UTC ). Text is available under the Creative Commons Attribution - ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. 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Question: what is a person who works on clocks called
Answer: horologists