Poison oak

Definition of Poison oak

(Bot.) a dermatitis-producing plant often lumped together with the poison ivy (Toxicodendron radicans) in common terminology, but more properly distinguished as the more shrubby Toxicodendron quercifolium (syn. Toxicodendron diversilobum), common in California and Oregon. Opinion varies as to whether the poison oak and poison ivy are only variants of a single species. See poison ivy, above.

See also: Poison

Related Words

Rhus dermatitis
Word:

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