A person whose gender identity is a combination of male/man and female/woman.

Green, E. R., & Peterson, E. N. [LGBT Resource Center at UC Riverside]. (2006). LGBTQI terminology (PDF). Retrieved from http://www.lgbt.ucla.edu/documents/LGBTTerminology.pdf.

Refers to those who identify as two genders. Can also identify as multigender (identifying as two or more genders). [Do notconfuse this term with Two-Spirit, which is specifically associated with Native American and First Nations cultures.]

Trans Student Educational Resource – http://www.transstudent.org/definitions/.