nevus -
A general term referring to a number of different, usually benign, pigmented, raised or otherwise abnormal lesions of the skin.
Wikipedia
Nevus (or naevus, plural nevi or naevi, from nævus, Latin for "birthmark") is the medical term for sharply-circumscribed and chronic lesions of the skin. These lesions are commonly named birthmarks and moles. Nevi are benign by definition.
OmegaWiki Dictionary
Ω
nevus A benign growth on the skin (usually tan, brown, or flesh-colored) that contains a cluster of melanocytes and may form a slight relief.
