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What does PI stand for?

PI stands for Poison Ivy

This definition appears very rarely and is found in the following Acronym Finder categories:

  • Science, medicine, engineering, etc.

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Other Resources:
We have 126 other meanings of PI in our Acronym Attic

Samples in periodicals archive:

At Fort Hancock, New Jersey, part of the National Parks of New York Harbor, Nubian goats have been munching away since last year, clearing some 40 years' growth of poison ivy that have made parts of the park all but inaccessible.
Researchers with the US Department of Agriculture say laboratory and field studies show that poison ivy is advancing with climate change and that its irritating oils are becoming even more potent.
Catch Batgirl as she dukes it out with Poison Ivy on The Batman, which airs Saturday mornings on Kids' WB
There is some debate as to whether poison ivy and poison oak are really two kinds of plants or just two names for the same plant.