# diamond
## English
### Etymology

From Middle English dyamaunt, from Old French diamant, from Late Latin diamās, from Latin adamās, from Ancient Greek ἀδάμᾱς (adámās, “diamond”). Doublet of adamant. The printing sense is a calque of Dutch diamant, used by Dirck Voskens who first cut it around 1700; compare pearl, ruby (“size of type between pearl and nonpareil”).

### Pronunciation

* IPA: /ˈdaɪ.ə.mənd/, /ˈdaɪ.mənd/
* Audio (US):(file)
* Audio (US):(file)

### Noun

diamond (countable and uncountable, plural diamonds)
* (uncountable) A glimmering glass-like mineral that is an allotrope of carbon in which each atom is surrounded by four others in the form of a tetrahedron.
    The saw is coated with diamond.
    synthetic diamond
* A gemstone made from this mineral.
    Synonym: (informal) sparkler
    The dozen loose diamonds sparkled in the light.
** 2012 March, Lee A. Groat, “Gemstones”, in American Scientist‎, volume 100, number 2, archived from the original on 14 June 2012, page 128:Although there are dozens of different types of gems, among the best known and most important are diamond, ruby and sapphire, emerald and other gem forms of the mineral beryl, chrysoberyl, tanzanite, tsavorite, topaz and jade.
** 2017, Nick Lake, Satellite, London: Hodder Children’s Books, →ISBN, page 259:she is wearing small diamond studs in her earlobes. the kind u wear if u’re a modest person & u don’t want to wear anything that could catch on stuff, or be a health risk in a hospital – but u’re still someone who cares.
* A diamond ring.
    What a beautiful engagement diamond.
* A very pale blue color.
    diamond:
* (heraldry) Sable, when blazoning by precious stones.
** 1720, Francis Nichols, Rudiments of Honour, page 296:Elphingston. Pearl a Chevron Diamond between three Boars Heads Eraz'd Ruby, arm'd of the first. / Eymouth. Diamond a Lyon Rampant Pearl, on a Canton of the 2d, a Cross Ruby.
** 1726, John Guillim, The Banner Display'd; Or, an Abridgment of Guillim, page 504:The Field is Ruby, on a Bend Topaz, three Martlets Diamond. The Armes of the most Noble and Puissant Lord, Edward Brabazon, Earl of Meath, and Baron of Atherdee in the Kingdom of Ireland. His Lordship's Atchievements are Quarterly of sixteen Coats. 1. Brabazon, as above. 2. Diamond, on a Chevron between three Pickaxes Pearl, as many Mullets Ruby, by the Name of Mosley. 3. Saphire, ten Bezants, 4, 3, 2, 1, by the Bisset.
** 1754, John Lodge, The Peerage of Ireland; Or, a Genealogical History of the ..., page 71:Pearl, an Eagle, Diamond, between three Crosses Patee, Ruby, for Morrys.
* Something that resembles a diamond.
    Synonym: adamant
* (geometry) A rhombus, especially when oriented so that its longer axis is vertical.
    Synonyms: lozenge, rhomb
** 2003, Kevin Crossley-Holland, “The Most Bitter Day”, in King of the Middle March (Arthur; 3), London: Orion Children's Books, →ISBN; 1st American edition, New York, N.Y.: Arthur A. Levine Books, Scholastic Inc., 2004 October, →ISBN, page 349:An adder writhes out of the bush, I can see the diamonds on its back; it shrithes across the sandy soil, and bites the right foot of one of the knights.
* (geometry) The polyiamond made up of two triangles.
    Synonym: 2-iamond
* (baseball) The entire field of play used in the game.
    Synonyms: ball field, baseball field
* (baseball) The infield of a baseball field.
    Synonyms: baseball diamond, infield
    Antonym: outfield
    The teams met on the diamond.
* (card games) A card of the diamonds suit.
    I have only one diamond in my hand.
* (Western Pennsylvania) A town square.
* (printing, dated) The size of type between brilliant and pearl, standardized as 4+$^1$⁄$_2$-point.

#### Derived terms

* accent diamond
* adamantine
* Alençon diamond
* American diamond
* baseball diamond
* black diamond
* blood diamond
* Bristol diamond
* chocolate diamond
* conflict diamond
* Cornish diamond
* deadly diamond of death
* diamond accent
* diamond anniversary
* diamond anvil cell
* diamondback
* diamondback moth (Plutella xylostella)
* diamond ball
* diamond beetle (Chrysolopus spectabilis)
* diamond bird (Pardalotus punctatus)
* diamond bracket
* diamond carry
* diamond cross
* diamond crossing
* diamond crossover
* diamond cut diamond
* diamond cutter
* diamond dove (Geopelia cuneata)
* diamond duck
* diamond dust
* diamond firetail (Stagonopleura guttata)
* diamond frame
* diamond geezer
* diamond graph
* diamond grass (Calamagrostis brachyathera)
* diamond hands
* Diamond Head
* diamondiferous
* diamond in the rough
* diamondize
* diamond jubilee
* diamond junction
* Diamond Lake
* diamond lane
* diamondless
* diamondlike
* diamond marimba
* diamond mortar
* diamond mullet (Planiliza alata)
* diamond number
* diamondoid
* diamond open access
* diamond paste
* diamond planet
* diamond plate
* diamond poem
* diamond problem
* diamond python (Morelia spilota spilota)
* diamond ring effect
* diamonds are a girl's best friend
* diamonds are forever
* diamond saw
* diamond-shaped
* diamond-square algorithm
* diamond sturgeon
* diamond turbot (Hypsopsetta guttulata)
* diamond turning
* diamond twill
* Diamond Valley
* diamond-water paradox
* diamond wedding
* diamond wheel
* diamond willow (Salix spp.)
* diamondwise
* double black diamond
* dreaded diamond
* fire diamond
* histodiamond
* hyperdiamond
* industrial diamond
* Irish diamond
* Killiecrankie diamond
* Mach diamond
* Matura diamond
* nanodiamond
* nondiamond
* pink diamond
* poor man's diamond
* pressure makes diamonds
* rose diamond
* rough diamond
* shock diamond
* table diamond, table-diamond
* thrust diamond
* tidal diamond

#### Related terms

* demantoid
* diamantine

#### Translations

    The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

#### See also

* argyle
* carbonado
* diamante
* paragon
* shlenter
* rhinestone
* brifka

### Adjective

diamond (not comparable)
* Made of, or containing diamond, a diamond or diamonds.
    Synonym: diamantine
    He gave her diamond earrings.
* Of, relating to, or being a sixtieth anniversary.
    Today is their diamond wedding anniversary.
* Of, relating to, or being a seventy-fifth anniversary.
    Today is their diamond wedding anniversary.
* (slang) First-rate; excellent.
    He's a diamond geezer.
    (The addition of quotations indicative of this usage is being sought:)

#### Translations
### Verb

diamond (third-person singular simple present diamonds, present participle diamonding, simple past and past participle diamonded)
* To adorn with or as if with diamonds.

#### Translations
### Further reading

* David Barthelmy (1997–2025) “Diamond”, in Webmineral Mineralogy Database.
* “diamond”, in Mindat.org‎, Hudson Institute of Mineralogy, 2000–2025.
* “diamond n.”, in Green’s Dictionary of Slang, Jonathon Green, 2016–present
* “diamond adj.”, in Green’s Dictionary of Slang, Jonathon Green, 2016–present
* Eric Partridge (2005) “diamond”, in Tom Dalzell and Terry Victor, editors, The New Partridge Dictionary of Slang and Unconventional English, volume 1 (A–I), London, New York, N.Y.: Routledge, →ISBN, page 580.