Gendercaecus

Gendercaecus is a gender that you cannot see or decipher. You may be able to feel the idea of it, as if you were seeing it with your eyes closed, only able to sense the difference between light and shadow. Your gender also makes it difficult to tell the gender of others, as if viewing them through the same blur of only light and shadow. Sometimes you find it difficult to understand that others do not experience gender the same way, because this is your normal.

History
This term was coined by Tumblr user mogai-luv on 11th August, 2020. The flag was created the same day.

Etymology
The term comes from the word 'caecus' meaning blind in Latin.