Queer: Historically a derogatory term for gays, this word is now used positively by many lesbian, gay, bisexual, and transgender people and allies. It is sometimes used to describe an open, fluid sexual orientation and/or gender identity expression.
From "Gender Identity and Sexual Orientation" chapter (p. 84) in Our Bodies, Ourselves, 2011 ed.
Other terms focusing on gender identity that reject an either/or male/female binary include non-binary, genderqueer, genderfluid, and gender non-conforming.
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