chloasma

(klo-az'mah) [G. chloazo, I become green.] The occurrence of light brown patches of irregular shape and size on the sldn of the face and elsewhere the pigmented patches are also called moth patches; and liver spots, c. bronzi'num, tropical mask, a bronze colored pigmentation occurring in gradually increasing areas on the face, neck, and chest in persons exposed continuously to the tropical sun. t. phthis'icum, pigmentation of the chest in pulmonary tuberculosis, c. uteri'- num, c, of the face occurring in pregnancy and in diseases of the uterus or ovaries, idiopath'ic c, c. occurring from external irritation, such as heat (c. cal or'icum), scratching (c. traumat'icum), local poisoning (c. tox'icum), etc. symptomatic c, c. occurring in the subjects of various systemic affections, such as syphilis or malaria.