Achiralgender

Achiralgender is an eugender without an antigender or an ungender, or vice-versa due to an impossibility of the reverse form. It's a gender that cannot possess a polar opposite. Can be used on its own or as an umbrella term for all gender identities without an opposite.

Etymology
The term achiralgender was taken from achiral, a molecule that cannot be superposed on its mirror image by any combination of rotations and translations.

Definitions

 * Text goes here. Put the original text used when coining here. - Person who coined, year

Additional commentary about what makes this gender unique here. If this gender's ever been accidentally recoined by the same name with a different definition, talk about that here too.

History
The term achiralgender was first coined by Tumblr user mogai-ringo on September 5th, 2018 in order to describe their experience.

Flags
The achiralgender flag was coined by a user going by Amnisty on November 17th, 2020. The gold represent the lone genders that achiralgender encompasses, the black represents the lack of an antigender, and the white represents multigenders that inherently have no opposite, such as pangender, since pangender encompasses agender as well, making no opposite for it.