noun, noun which may take the genitive case particle 'no'
heterosexuality; heterosexual love
Refers to sexual and romantic attraction to the opposite sex. Often used in academic or formal contexts, but also in everyday language.
異性愛は多くの社会で多数派の性的指向です。
Heterosexuality is the majority sexual orientation in many societies.
異性愛者向けのイベントが開催された。
An event for heterosexual people was held.
Bisexuality; attraction to both sexes.
Compound of 異性 (isei, 'opposite sex') and 愛 (ai, 'love'). The term is a modern coinage, likely from the early 20th century, paralleling the formation of 同性愛 (dōseiai, 'homosexuality').