chloasma

noun
chlo·​as·​ma | \ klō-ˈaz-mə How to pronounce chloasma (audio) \
plural chloasmata\ -​mət-​ə How to pronounce chloasmata (audio) \

Medical Definition of chloasma

: irregular brownish or blackish spots especially on the face that occur sometimes in pregnancy and in disorders of or functional changes in the uterus and ovaries