chalcididanEntom.|kælˈsɪdɪdən| [f.mod.L. Chalcidid-æ, f. the generic name Chalcides, f.Gr. χαλκός brass.] A member of a family of small hymenopterous insects, ornamented with brilliant metallic colours. 1835Kirby Hab. & Inst.Anim. II. xx. 334 A minute species..belonging to the family of Chalcididans.