Unitumgender

Unitumgender is a gender modality for a cis headmate in a trans body. For example, one might be a cis man in an AMAB (but transitioning feminine) body, or a cis man in an AFAB body that is transmasc/transneut.

This term is only for system members.

History and Flag
The term was coined by Tumblr user plurgai-archive along with other terms for system members with genders different from the body. The flag was coined in the same post.

Etymology
The term comes from the Latin word, unitum, which means united.