I am writing an article and need to select between "transfeminine" and "trans feminine", in reference to a gender identity descriptor. Both terminology choices are seen in scholarly literature, but "transfeminine" appears to be more common. I am familiar with the fact that "trans women" is considered an accepted term, whereas "transwomen" is not, because "trans women" treats "trans" as an adjective/modifier of "women," indicating that trans women are within the category of women, vs. a distinct category requiring a separate and unique term.
However, I have not seen this articulated for / generalized to "trans feminine" vs. "transfeminine" and I could imagine culturally current and informed justifications for using either term. I could also foresee near-future culture and language evolving to favor one term, or not, and while I know that such changes can't be known in advance, they may be predictable. So, if you have any thoughts / input on the pros and cons of using either term in a publication, I appreciate it.