ber·dache 
(bər-dăsh)
(bər-dăsh)n.
Among certain Native American peoples, a person, usually a male, who assumes the gender identity and is granted the social status of the opposite sex.
[North American French, from French bardache, catamite, from Italian dialectal bardascia, from Arabic bardaj, slave, from Persian bardah, prisoner, from Middle Persian vartak, from Old Iranian *varta-; see welə- in the Appendix of Indo-European roots.]
ber·dachism n.