mo·nog·a·my
noun/məˈnɒɡəmi/
/məˈnɑːɡəmi/
[uncountable]- the fact or custom of being married to only one person at a particular time
一夫一妻（制） - the practice or custom of having a sexual relationship with only one partner at a particular time
单配偶；单配性
Word Originearly 17th cent.: from French monogamie, via ecclesiastical Latin from Greek monogamia, from monos ‘single’ + gamos ‘marriage’.