The difference between Maternal uncle and Uterine nephew
When used as nouns, maternal uncle means the brother or brother-in-law of one's mother, whereas uterine nephew means the son of one's sister.
check bellow for the other definitions of Maternal uncle and Uterine nephew
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Maternal uncle as a noun:
The brother or brother-in-law of one's mother.
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Uterine nephew as a noun (anthropology):
The son of one's sister.