adelphogamy noun3 •Mating between ants descended from the same queen.But, however true it may be that all of the products of adelphogamy have but a single mother, we cannot ignore the fact that they have divers fathers. — 1928 •Marriage between a brother and a sister.What made Tiye encourage her children to engage in adelphogamy, especially given that Semenkhkara had already become a victim? — 2024 •A form of polyandry in which a woman is married to two or more brothers.The tradition is quite different from the Han-Chinese, but may have the same origin as the adelphogamy of the Tibetan people, or be a variation of it. — 1961