The Collaborative International Dictionary of English v.0.48:
Lentigo \Len*ti"go\ (l[e^]n*t[imac]"g[-o]), n. [L., fr. lens, lentis, lentil.] (Med.) A freckly eruption on the skin; freckles. [1913 Webster]WordNet (r) 3.0 (2006):
lentigo n 1: a small brownish spot (of the pigment melanin) on the skin [syn: freckle, lentigo]