avunculate

From Latin avunculus (“uncle”).

avunculate (plural avunculates)

1. (anthropology) The relationship between a man and his sister's children, generally her sons.
2. (anthropology) Among certain tribal peoples, for example, the Korowai, a special relationship between a man and a maternal uncle, and the mutual responsibilities between them.

avunculate (not comparable)

1. Pertaining to a society where the avunculate is of central importance.

   avunculate society

2. Pertaining to a marriage to one's aunt, uncle, niece or nephew.

   avunculate marriage

• avuncular