co-uncle

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Noun

co-uncle (plural co-uncles)

1. of a man, an uncle of one's niece or nephew who is not one's brother; a co-brother-in-law as common uncle to the children of two men's married siblings.
2. a man's brother, as uncle in common to the children of a third sibling

   My nephew came up for the summer with my brother and co-uncle George.

Synonyms

• co-brother-in-law (relative to the married siblings rather than to the children; however, this term generally refers to a different relationship, that of two men who marry sisters)

Related terms

• co-grandfather

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