uncle

Uncle (from Latin: avunculus the diminutive of avus "grandfather") is a male family relationship or kinship within an extended or immediate family. An uncle is the brother, half-brother, step-brother, or brother-in-law of one's parent, or the husband of one's aunt or uncle. The specific terms for the last three respectively are half-uncle, stepuncle and uncle-in-law which can refer also to the husband of one's aunt. A biological uncle is a second degree male relative and shares 25% genetic overlap. However people who are not a biological uncle, are sometimes affectionately called as an uncle, as a title of admiration and respect.
A woman with the equivalent relationship of an uncle is an aunt. The reciprocal relationship to both of these is that of a nephew or niece.
A great-uncle (sometimes written as great uncle, grand-uncle or granduncle) is the brother or brother-in-law of one's grandparent.
A male cousin of one's parent is often addressed as "uncle" instead of "cousin".

View More On Wikipedia.org