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amethyst

[am-uh-thist] /ˈæm ə θɪst/
noun
1.
a purple or violet quartz, used as a gem.
2.
a purplish tint.
adjective
3.
having the color of amethyst.
4.
containing or set with an amethyst or amethysts:
an amethyst brooch.
Origin
1250-1300
1250-1300; < Latin amethystus < Greek améthystos not intoxicating, not intoxicated (so called from a belief that it prevented drunkenness), equivalent to a- a-6 + methys- (variant stem of methýein to intoxicate; see methylene) + -tos verbal adjective suffix; replacing Middle English ametist < Anglo-French ametiste < Latin
Related forms
amethystine
[am-uh-this-tin, -tahyn] /ˌæm əˈθɪs tɪn, -taɪn/ (Show IPA),
adjective
amethystlike, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for amethysts

amethyst

/ˈæmɪθɪst/
noun
1.
a purple or violet transparent variety of quartz used as a gemstone. Formula: SiO2
2.
a purple variety of sapphire; oriental amethyst
3.
the purple colour of amethyst
Derived Forms
amethystine (ˌæmɪˈθɪstaɪn) adjective
Word Origin
C13: from Old French amatiste, from Latin amethystus, from Greek amethustos, literally: not drunken, from a-1 + methuein to make drunk; referring to the belief that the stone could prevent intoxication
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for amethysts
amethyst
violet quartz, late 13c., from O.Fr. ametiste (Mod.Fr. améthyste), from L. amethystus, from Gk. amethystos "amethyst," lit. "not intoxicating," from a- "not" + methyskein "make drunk," from methys "wine;" based on the stone's ancient reputation for preventing drunkenness. Spelling restored from M.E. ametist.
Online Etymology Dictionary, © 2010 Douglas Harper
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amethysts in Science
amethyst
  (ām'ə-thĭst)   
A purple or violet, transparent form of quartz used as a gemstone. The color is caused by the presence of iron compounds in the crystal structure.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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amethysts in the Bible

one of the precious stones in the breastplate of the high priest (Ex. 28:19; 39:12), and in the foundation of the New Jerusalem (Rev. 21:20). The ancients thought that this stone had the power of dispelling drunkenness in all who wore or touched it, and hence its Greek name formed from _a_, "privative," and _methuo_, "to get drunk." Its Jewish name, _ahlamah'_, was derived by the rabbins from the Hebrew word _halam_, "to dream," from its supposed power of causing the wearer to dream. It is a pale-blue crystallized quartz, varying to a dark purple blue. It is found in Persia and India, also in different parts of Europe.

Easton's 1897 Bible Dictionary
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