The difference between Mother's mark and Naevus
When used as nouns, mother's mark means a congenital mark upon the body, whereas naevus means a pigmented, raised or otherwise abnormal area on the skin. naevi may be congenital or acquired, and are always benign.
check bellow for the other definitions of Mother's mark and Naevus
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Mother's mark as a noun:
A congenital mark upon the body; a naevus.
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Naevus as a noun (anatomy):
A pigmented, raised or otherwise abnormal area on the skin. Naevi may be congenital or acquired, and are always benign.