Heterophobia is a fear, hatred, or aversion to heterosexual people. Heterophobia is most commonly experienced by homosexual, bisexual, and asexual people, who view heterosexual people as very different to themselves.
The term heterophobia is a portmanteau of the prefix hetero, meaning other or different, and phobia, an irrational fear. It is a variation of the more commonly used term describing similar feelings directed towards homosexual people, homophobia. It came into popular usage in the late 1970s.