Learn how to say Polygamist correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word polygamy:
the practice or custom of having more than one wife or husband at the same time.
Zoology a pattern of mating in which an animal has more than one mate.
Botany the condition of bearing some flowers with stamens only, some with pistils only, and some with both, on the same or different plants.
late 16th century: from French polygamie, via late Latin from Greek polugamia, from polugamos ‘often marrying’