porcupine(redirected from Quill pig)
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two families of rodents, the New World (Erethizontidae) and Old World (Hystricidae) porcupines have long, erectile spines or quills. All are nocturnal, some are arboreal, some live in burrows. The quills are a cause of major injury to individual dogs that attack the animals. Called also Hystrix cristata (common porcupine), Erythizon dorsatum (Canadian porcupine).
members of the family Diodontidae, the flesh of which is poisonous, causing hypotension, hypothermia, emesis and paralysis.