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phototoxin

American

[foh-tuh-tok-sin] / ˈfoʊ təˌtɒk sɪn /

noun

Biochemistry. a plant toxin causing an allergic reaction when touched or eaten by a susceptible person or animal subsequently exposed to sunlight.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023