Pronunciation: (thôrn), [key]
1. any poisonous plant belonging to the genus Datura, of the nightshade family, the species of which bear capsules covered with prickly spines, esp. the jimson weed, D. stramonium.
2. the fruit of certain hawthorns of the genus Crataegus.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.