n. 一妻多夫, 多雄蕊式

[医] [一雌]多雄配合, [一妻]多夫配合

[ noun ]
having more than one husband at a time
<noun.state>

Polyandry \Pol`y*an"dry\, n. [Poly- + Gr. 'anh`r, 'andro`s, man,
male: cf. F. polyandrie.]
The possession by a woman of more than one husband at the
same time; -- contrasted with {monandry}.

Note: In law, this falls under the head of polygamy.