Heterosexual (adjective)

1. A person who is attracted to the opposite sex.
2. Relating to sexual attraction to the opposite sex.

Origin:

The word "heterosexual" comes from the greek words "hetero" which means "different" and "sexual" which means "relating to sex or sexual activity." it is used in the late 19th century to describe a person who is attracted to the opposite sex.

Examples:

1. He is a heterosexual man.
2. She is a heterosexual woman.
3. Most people are heterosexual.
4. The study found that the majority of participants identified as heterosexual.
5. The couple has a heterosexual relationship.