psoralen Hear it!

psoralen definition

pso·ra·len (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

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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