From Middle English ametist, from Old French ametiste (French améthyste), from Ancient Greek ἀμέθυστος (améthustos, “not drunk”), from ἀ- (a-, “not”) + μεθύω (methúō, “I am drunk”), from μέθυ (méthu, “wine”). The Greeks believed that the amethyst prevented intoxication.
amethyst (plural amethysts)
- A transparent purple variety of quartz, used as a gemstone.
- 2012 March 1, Lee A. Groat, “Gemstones”, in American Scientist, volume 100, number 2, page 128:
- Although there are dozens of different types of gems, among the best known and most important are […] . (Common gem materials not addressed in this article include amber, amethyst, chalcedony, garnet, lazurite, malachite, opals, peridot, rhodonite, spinel, tourmaline, turquoise and zircon.)
- (uncountable) A purple colour.
- (heraldry) The tincture purpure, when emblazoning the arms of the English nobility.
- The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout § Translations.
- Having a colour similar to that of the gemstone
- David Barthelmy (1997–2021) , “Amethyst”, in Webmineral Mineralogy Database
- “amethyst”, in Mindat.org, Hudson Institute of Mineralogy, 2000–2021.
- The Manual of Heraldry, Fifth Edition, by Anonymous, London, 1862, online at 
amethyst m (plural amethystau)
|Note: Some of these forms may be hypothetical. Not every|
possible mutated form of every word actually occurs.
- R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present) , “amethyst”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies