Abiatrinary refers to someone who is both abinary and atrinary. This could also be called ABAT, due to abinary being shortened to AB, and due atrinary being shortened to AT.
Labels that fall underneath ABAT are atrigirl and atriboy.
Someone who is AB but is not AT is ternabinary, and someone who is AT and is not AB is atribinary.
Abiatri- could be used as a prefix too if one didn't feel comfortable with atri-. For example, one could be a abiatrigirl, instead of a atrigirl.
History
The term was coined by Reddit user u/hiitsyaz in August 2021, with no specified date.
Etymology
This gender is a combination of the labels abinary and atrinary.