A bluish spot of the skin caused by the presence of melanocytes in the dermis, commonly seen in the sacral region of newborn Oriental, Amerindian, and black children, and often fading with age.
Origin
Early 20th century.
Definition of Mongolian spot in US English:
Mongolian spot
noun
Medicine
A bluish spot of the skin caused by the presence of melanocytes in the dermis, commonly seen in the sacral region of newborn Oriental, Amerindian, and black children, and often fading with age.