Centrigender
Centrigender is an umbrella term for gender identities that are defined as being in-between multiple genders.
It is not necessarily a polygender or multigender identity, but can be a possibility. Some people use androgyne as a centrigender of male and female or masculine and feminine genders, for example.[1] It shouldn't be confused with intergender.
Centrigender is not limited to genders centered in the middle between two other genders only. It is possible for someone to be centrigender between neutrois, caelgender, and maverique, for example.[2]
History
Centrigender was coined in a Tumblr post made on January 13th, 2019, by imoga-pride. Meanings for its flag were not provided.[3][4]