Definition of unisexual in US English:



  • 1(of an organism) either male or female; not hermaphrodite.

    • ‘Both individuals and gametes were unisexual, and self-fertilization was allowed.’
    • ‘When H. frenatus arrives on an island, the population of the unisexual species plummets.’
    • ‘As is the condition in other unisexual vertebrates, the silver crucian carp probably has a hybridization origin.’
    • ‘Various species may be unisexual, hermaphroditic, or have separate sexes.’
    • ‘This means that the unisexual females are actually parasitizing bisexual males of these other species.’
    1. 1.1Botany (of a flower) having either stamens or pistils but not both.
      • ‘Plants are characterized as having unisexual flowers and dichotomously forked leaves arranged in crowded whorls.’
      • ‘The genus has reduced unisexual flowers grouped into characteristic pseudanthia called cyathia.’
      • ‘Sexually the species are structurally gynodioecious, but there is a strong tendency towards dioecism with apparently bisexual flowers often being functionally unisexual.’
      • ‘The genera of Atripliceae, as the tribe is traditionally defined, have flowers that are usually unisexual and enclosed by well-developed bracteoles.’
      • ‘They have unisexual flowers, are wind-pollinated, and apparently have a very short and inconspicuous flowering time so that the presence of flowers is easily overlooked.’
  • 2Biology
    Involving or repesenting only one sex.

    ‘a single parthenogenetic female reaching a favourable new habitat can start a new unisexual population’