female-to-male

Short definition from Wiktionary

Adjective

1. 1
   Transitioning or having transitioned (in gender identity or presentation, physically, etc) from being female to being male.
2. 2
   That changes a female end (usually a socket) of a connection into a male one (with pins, usually a plug).
3. 3
   Used other than figuratively or idiomatically: see female, to, male.

Noun

1. 1
   A female-to-male transsexual or transgender person; a trans man.