Dictionary.net

Having the sexes in two separate individuals; -- applied to plants in which the female flowers occur on one individual and the male flowers on another of the same species, and to animals in which the ovum is produced by one individual and the sperm cell by another; -- opposed to monoecious.

Pert. to the dioecia-a class of plants having male flowers on one plant and female on another.

Having the sexes separate; having the male and female flowers on different individuals.