omnigamy en · NOUN
Etymology
From omni- + -gamy.
Meanings
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(uncountable) A social system in which each man of a community is married to all the women and each woman is married to all the men.
Some of these are poly intimacy, polyamory, polygamy, omnigamy, multimate, multiple adult relationship, combo, cellular family, expanded family, nonexclusive relationship, intimate friendship and inclusive relationship.
1992, Deborah M. Anapol, Love without limits, page 4: