Di*e"ci*a (?), n. pl. [NL., fr. Gr. = twice + a house.]
1. Bot.
A Linnaean class of plants having the stamens and pistils on different plants.
2. Zool.
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.
© Webster 1913.