Transgender..The original label coined by professionals for Trans Sexual because many Trans people did not like "sex" in the original label for Trans Sexual..
Why the label became a umbrella for all Trans people and how is not certain but many believe it happened due to the internet from Individuals typing in Trans* with a asterisk* for "Trans Masculine" or "Trans Vestite" for discovering their own experience .. But older 80's GLBT message boards suggest the term was always T*.
However in the 90's Trans* was the chosen click for describing the younger generations experience while searching the internet which could mean a new label today is only one click away..