co-uncle

  1. Noun.  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. Noun.  a man's brother, as uncle in common to the children of a third sibling.

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This entry was last updated on RefTopia from its source on 3/20/2012.