Dictionary

poison ivy

noun

: a common plant in the central and eastern U.S. that has leaves which cause a very itchy and painful rash on your skin if you touch them

: the rash that is caused by poison ivy

Full Definition of POISON IVY

1
a :  a climbing plant (Toxicodendron radicans syn. Rhus radicans) of the cashew family that is especially common in the eastern and central United States, that has ternate leaves, greenish flowers, and white berries, and that produces an acutely irritating oil causing a usually intensely itching skin rash
b :  any of several plants closely related to poison ivy
2
:  a skin rash caused by poison ivy

Examples of POISON IVY

  1. I got poison ivy all over my arm.

Illustration of POISON IVY

First Known Use of POISON IVY

1784

poison ivy

noun \-ˈī-vē\   (Medical Dictionary)

Medical Definition of POISON IVY

1
a :  a climbing plant of the genus Rhus (R. radicans synonym Toxicodendron radicans) that is especially common in the eastern and central United States, that has leaves in groups of three, greenish flowers, and white berries, and that produces an acutely irritating oil causing a usually intensely itching skin rash b :  any of several plants closely related to poison ivy; especially :  poison oak 1b
2
:  a skin rash produced by poison ivy

Illustration of POISON IVY

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