amethyst Meaning, Definition & Usage

  1. noun a transparent purple variety of quartz; used as a gemstone
  2. adjective satellite of a moderate purple color

WordNet

Am"e*thyst
Etymology
F. ametiste, amatiste, F. améthyste, L. amethystus, fr. Gr. without drunkenness; as a noun, a remedy for drunkenness, the amethyst, supposed to have this power; priv. + to be drunken, strong drink, wine. See Mead.
Definitions
  1. (Min.) A variety of crystallized quartz, of a purple or bluish violet color, of different shades. It is much used as a jeweler's stone.
  2. (Her.) A purple color in a nobleman's escutcheon, or coat of arms.

Webster 1913