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poison oak

poison oak

1 6.1
A skin rash caused by touching the plant's oil
  • noun
  • /ˈpɔɪzən oʊk/
  • US
translation icon : dermatitis por hiedra venenosa
  • After hiking through the forest, I developed a rash from my exposure to poison oak.
  • case of poison oak

Examples

  • I look up from a carpet of what I hope isn't poison oak or something to see Mr. Morse clicking the empty revolver five more times at my head.

    Fiction book (1999)
  • It's too late for you now, but Fels Naptha laundry soap works great for getting poison oak/ivy oil off the skin shortly after exposure.

    Blog text (21)
  • Did you get poison oak or something?

  • Well, what do you expect when you roll around in poison oak?

  • I got poison oak, too!

  • - Well, I did deploy the poison oak spray.

  • You know, I once got poison oak on my bu... back.

  • I've had poison oak a million times.

  • Has it escaped your attention that these children have head-to-toe poison oak?

  • More calamine lotion for the poison oak has just arrived.

Synonyms

poison ivy
vspoison oak
  • US
3 4.1

A skin reaction that makes a red, itchy rash after touching the plant

is described as dermatitis caused by allergenic oils rather than just itchiness
Rhus dermatitis
vspoison oak
  • Specialized
8.9

A skin rash you get from touching plants like poison ivy or poison oak

is the narrower reaction to one plant's allergenic oils rather than many species

How Severe

skin disease
5 3.3
dermatitis
  • Specialized
5 5.0
contact dermatitis
  • Specialized
1 5.1
poison oak
  • US
1 6.1
skin rash
4 3.0

Surface Forms

poison oak singular
poison oaks plural

Morphology

poison + oak

The meaning is directly derivable from combining 'poison' (harmful substance) with 'oak' (a type of tree): a learner will infer it is an oak that is harmful/poisonous. Noun–noun compounds that name a harmful plant are cross-linguistically common, so a B1 learner who knows both constituents will generally understand that this refers to a poisonous/irritant plant (likely causing a rash).

Etymology

Poison oak also means the red, itchy 'skin irritation' you get after touching the plant, because the plant's oil acts like a 'poison' on the skin.