Transbian
A trans woman who is a lesbian.
Transbian is a portmanteau of trans and lesbian, used by trans women and transfeminine people who are attracted to women.
It exists partly for precision and partly for community. Trans lesbians have a specific set of experiences — including being told, by some corners of both lesbian and trans spaces, that they don't belong in either — and having a word makes it easier to find each other.
It's an in-group term. Trans lesbians use it about themselves warmly; from outside it can read as a way of marking them as a separate category of lesbian, which is exactly the treatment the word was coined against.