Definition of chloasma in English:



mass noun
  • A temporary condition, typically caused by hormonal changes, in which large brown patches form on the skin.

    • ‘Other changes include a laxity of the joints, which ultimately may assist labour and birth, and increased brown pigmentation of the skin (‘chloasma’ if in the face).’
    • ‘Melasma (also called chloasma) is a condition in which areas of the skin become darker than the surrounding skin.’
    • ‘Frequently called the ‘mask of pregnancy,’ melasma (chloasma) differs from the ruborous glow of pregnancy.’
    • ‘Melasma (also known as chloasma) is a skin condition in which brown patches occur primarily on the cheekbones, forehead and upper lip.’


Mid 19th century: from Greek khloazein ‘become green’.