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phototoxin

[foh-tuh-tok-sin] /ˈfoʊ təˌtɒk sɪn/
noun
1.
Biochemistry. a plant toxin causing an allergic reaction when touched or eaten by a susceptible person or animal subsequently exposed to sunlight.
Origin
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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