CHLOASMA
chloasma, melasma, mask of pregnancy
(noun) a tan discoloration of a woman’s face that is associated with pregnancy or with the use of oral contraceptives
Source: WordNet® 3.1
Etymology
Noun
chloasma (countable and uncountable, plural chloasmas or chloasmata)
(medicine) melasma; a cutaneous condition with yellow or yellowish-brown pigmented spots
Source: Wiktionary
Chlo*as"ma, n. Etym: [Gr. (Med.)
Definition: A cutaneous affection characterized by yellow or yellowish
brown pigmented spots.
Source: Webster’s Unabridged Dictionary 1913 Edition