‖Di‐œ″ci‐a (dī̍‐ē″shĭ‐ȧ), n. pl. [NL., fr. Gr. δι = δίσ twice + οἰ̑κοσ a house.] 1. (Bot.) A Linnæan class of plants having the stamens and pistils on different plants.
2. (Zoöl.) A subclass of gastropod mollusks in which the sexes are separate. It includes most of the large marine species, like the conchs, cones, and cowries.