Navus

·noun A spot or mark on the skin of children when born; a birthmark;

— usually applied to vascular tumors, ·i.e., those consisting mainly of blood vessels, as dilated arteries, veins, or capillaries.

navus
nāvus (gnāvus), a, um, adj. [Sanscr. gnā, know; Gr. γιγνώσκω; cf. Lat. notus, gnarus; for signif. ...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
navus
nāvus (gnāvus) adj. GNA-, busy, diligent, assiduous, active : homo: aratores. ...

An Elementary Latin Dictionary