diœcious

from The Century Dictionary.

• In. botany, unisexual, the male and female flowers being borne on seprate plants, as in the willow, prickly ash, and hemp.
• Having the flowers unlike on different plants of the same species: used only with modifying prefixes, as androdiœcious, when the flowers on some plants are all male and on others all hermaphrodite (a hypothetical case), and gynodiœcious, when they are in like manner female and hermaphrodite.
• In zoology, sexually distinct; having the two sexes in different individuals; opposed to monœcious. Also diœcian, dioic, dioicous.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Alternative spelling of dioecious.