“Poisonous—often confused with venomous—means a plant, animal, or substance capable of causing death or illness if taken into the body. Venomous means capable of injecting venom. A rattlesnake is not itself poisonous, because if you eat one it won’t poison you. A blowfish will kill you if you eat it, so it is poisonous, but not venomous.”
This is number six in Laura Hale Brockway’s list of “8 words that may not mean what you think they mean” on PR Daily. And it’s true that poisonous may not mean what you think it means, but this also implies that it may mean exactly what you think it means, and as it turns out, it does.
Though this was the first time I heard this complaint, it turns out to be mildly common. Paul Brians mentions it in his common errors — in fact, Brockway seems to have lifted half of…
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