Ageregender

Ageregender is an umbrella term for those whose gender either entirely, partially, or temporarily changes when they regress. It is exclusive for age regressors.

Etymology
Agere is a shortened term for age regression which is what this gender is based on

Pronunciation
/ a - j - re - j - en - d - er \

History
The terms were coined by Tumblr user recovery-within-the-iris on November 13, 2019. The flag was uploaded along with the post.

Sub-categories
Agerefem - an age regressor who becomes female when they regress, and aren't female when they are big, either partially or entirely.

Ageremasc - an age regressor who becomes male when they regress, and aren't male when they are big, either partially or entirely.

Agerenby - an age regressor who becomes non-binary when they regress, and aren't non-binary when they are big, either partially or entirely.

Source
https://archive.ph/qLijR