polygamous
po-LY-ga-mous
adjective
Practising or involving polygamy, where one individual has multiple spouses or mates.
"Some bird species are polygamous, with one male mating with several females."
Thesaurus
Synonyms: monoecious, monecious, heteroicous, polyoicous, monoicous, bigamous, polygynous, polyandrous
Antonyms: monogamous