What's the "een" in Halloween?
dioecious di·oe·cious or di·e·cious (dī-ē'shəs)
Of or relating to organisms, especially plants, having the male and female reproductive organs borne on separate individuals of the same species; sexually distinct.
Having male flowers on one plant and female flowers on another plant of the same species. The holly and asparagus plants are dioecious. Compare monoecious.