\Di*[oe]"ci*a\ (d[-i]*[=e]"sh[i^]*[.a]), n. pl. [NL.,
fr. Gr. di = di`s twice + o'i^kos a house.]
1. (Bot.) A Linn[ae]an class of plants having the stamens and
   pistils on different plants.
2. (Zo["o]l.) 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.