phototoxin: Meaning and Definition of

pho•to•tox•in

Pronunciation: (fō'tu-tok"sin), [key]
— n.
  1. a plant toxin causing an allergic reaction when touched or eaten by a susceptible person or animal subsequently exposed to sunlight.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.