syndyasmian

Etymology
From, from +.

Adjective

 * 1) Pertaining to the state of pairing together sexually; said of animals during periods of procreation and while rearing their offspring.
 * 2) Pertaining to a family structure in which couples pair off (sometimes only temporarily for the rearing of children), but do not practice exclusive cohabitation, instead living with others in a communal household.