poi'son i'vy

1. a vine or shrub, Rhus radicans, having trifoliate leaves and whitish berries and causing severe dermatitis when touched by persons sensitive to it.
2. See poison oak.
3. the rash caused by touching poison ivy.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

poisoningpoison oak
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