polyandry

noun

1. 1

   The having of a plurality of husbands at the same time; usually, the marriage of a woman to more than one man, or the practice of having several husbands, at the same time.

2. 2

   The mating pattern whereby a female copulates with plural males.

3. 3

   Sexual relations with multiple males, by a female or a male, human or non-human, within or without marriage.