I. noun 1. a precious stone consisting of a violet or purple variety of quartz. • a delicate necklace of amethysts and pearls.
• [as modifier]
2. a violet or purple colour[as modifier] • an amethyst dress.
II. derivatives amethystine /aməˈθɪstiːn / adjective
– origin Middle English: via Old French from Latin amethystus, from Greek amethustos ‘not drunken’ (because the stone was believed to prevent intoxication).