(Noun: Heterofanaticism)
The technical term for any straight person that sees heterosexuality as the one and only true and natural sexuality and therefore cannot possibly accept any other gender with the incredible lack of common sense they have. This often refers to any sort of homophobic, transphobic and other anti-LGBTQ behaviour.
"Dude, have you heard? The owner literally banned someone just because they were homosexual!"
"Seriously? What is that guy?Some sort of heterofanatic?
Having a gender identity that is different from one's birth-assigned sex; synonymous with transgender.
Its antonym is homogender, which is synonymous with cisgender.
From the Greek prefix hetero-, meaning "different", and gender. Coined as a complementary word to "homogender", which was coined because some homogender people object to the term "cisgender". It remains to be seen whether these terms will be accepted.
Not every heterogender person knows their gender from birth. As a child, I didn't use to think I was a girl, but I was uncomfortable with looking like a boy and playing with other boys. I felt much more comfortable in the company of girls. It was only in adulthood that I realized what that had meant, and now I'm a proud heterogender woman.