First recorded in 1970–75
Female-to-male was once the accepted terminology for men who were assigned female at birth. The term continues to be used in medical literature, and some transgender people do identify that way. Especially among younger transgender people, however, trans man is now a more popular term for this demographic. For some people, the term female-to-male can be offensive for its implication that trans men were “originally” female, and have only now become male.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023