uni·sex·u·al /ˌjunəˈsɛkʃ(ə)wəl, ʃəl/
  (a.)單性的,雌雄異體的
  U·ni·sex·u·al a.  Biol. Having one sex only, as plants which have the male and female flowers on separate individuals, or animals in which the sexes are in separate individuals; diœcious; -- distinguished from bisexual, or hermaphrodite. See Diœcious.
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  unisexual
       adj : relating to only one sex or having only one type of sexual
             organ; not hermaphroditic