Psoralen
noun, Pharmacology.
1.
a toxic substance, C 1 1 H 6 O 3 , found in certain plants, including parsnips, used to increase the response to ultraviolet light in the treatment of severe cases of acne and psoriasis.
psoralen pso·ra·len (sôr’ə-lən)
n.
Any of a group of chemical compounds found naturally in certain plants that are used in the treatment of psoriasis and vitiligo.
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