psoralen

(sôr′ə lən)

noun

any of various derivatives of coumarin used in drugs to treat psoriasis, etc.: when activated by sunlight it causes the skin to darken

See psoralen in American Heritage Dictionary 4

noun

Any of a group of chemical compounds found naturally in certain plants that are used in the treatment of psoriasis and vitiligo.

Origin:

Origin: From New Latin Psōralea, plant genus

Origin: , from Greek psōralea

Origin: , neuter pl. of psōraleos, mangy (from the appearance of the plants' leaves)

Origin: , from psōrā, itch

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