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psittacine
psittacosaurus
psittacosis
PSL
PSNCR
PSNI
psoas
psocid
psoralen
psoriasis
psst
PST
PSTN
PSV
psych
psych-
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psoralen

pso·ra·len [ sáwrələn ]


noun 
Definition:
 
plant chemical: a chemical that reacts with DNA in the presence of light and can cause mutations. Source: umbelliferous plants such as celery, carrots, parsley. Use: with ultraviolet light in treatment of severe acne and psoriasis.

[Mid-20th century. < modern Latin Psoralea< Greek psōraleos "itchy" < psōra "itch, mange"]
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