lentigo

noun
len·​ti·​go | \ len-ˈtī-(ˌ)gō How to pronounce lentigo (audio) , -ˈtē- How to pronounce lentigo (audio) \
plural lentigines\ len-​ˈtij-​ə-​ˌnēz How to pronounce lentigines (audio) \

Medical Definition of lentigo

1 : a small melanotic spot in the skin in which the formation of pigment is unrelated to exposure to sunlight and which is potentially malignant especially : nevus — compare freckle
2 : freckle