Lewis & Short

† ămĕthystus, i, f., = ἀμέθυστος.

  1. I. The amethyst, a precious stone of violet-blue color, Plin. 37, 9, 40, § 121 sqq.; Vulg. Exod. 28, 19; ib. Apoc. 21, 20.
  2. II. A kind of vine, Col. 3, 2, 24; cf. Plin. 14, 2, 4, § 31.