from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Of or relating to both sexes.
  • adjective Having both male and female reproductive organs; hermaphroditic.
  • adjective Botany Denoting a single flower that contains functional staminate and pistillate structures; perfect.
  • adjective Of, relating to, or having a sexual orientation to persons of either sex.
  • noun A bisexual organism; a hermaphrodite.
  • noun A bisexual person.

from The Century Dictionary.

  • In ethnology, characterized by an equal social development of both sexes.
  • Having the organs of both sexes in one individual; of two sexes; hermaphrodite.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective (Biol.) Of both sexes; hermaphrodite; as a flower with stamens and pistil, or an animal having ovaries and testes.

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

  • adjective sexuality Sexually attracted to members of either sex.
  • adjective botany Of flowers: having both pollen and seeds.
  • adjective botany Of sporophytes: having both male and female organs.
  • adjective botany Of gametophytes: producing both eggs and sperm.
  • adjective botany Of fungi: producing both the "female" ascogonium and the "male" antheridium.
  • adjective rare Hermaphroditic.
  • noun A person who is bisexual. Someone who is attracted to both males and females.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective having an ambiguous sexual identity
  • adjective sexually attracted to both sexes
  • noun a person who is sexually attracted to both sexes


from Wiktionary, Creative Commons Attribution/Share-Alike License

bi- +‎ sexual



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  • "All great novels, all true novels, are bisexual."

    -Milan Kundera

    December 15, 2010

  • "The original Man, the Individual first created, was bi-sexual." -Aids to Reflection, 1824

    Coleridge was the first to use the word in print, but not in the same way it's used today. He used it to mean that humans are born with both masculine and feminine characteristics, and "learn" to act masculine or feminine. The word wasn't used to describe someone with attraction to either gender until the 1890s.

    March 5, 2018