glaesum (glēsum, glessum), i, n. cf. Germ. Glas; gleissen = glanzen, to glimmer; Engl. glass, amber, Tac. G. 45; Plin. 37, 3, 11, § 42.

—Hence, glaesārius, a, um, adj., of amber, amber-: insula, which produces amber, Plin. 4, 13, 27, § 97; 37, 3, 11, § 42.