Relatively large rodents with sharp erectile bristles mingled with the fur WordNet 3.0 & Open English WordNet

Porcupines are large rodents with coats of sharp spines, or quills, that protect them against predation. Wikipedia

Mammal best known for its coat of sharp spines, or quills, that provides a defense from predators. Wikipedia Disambiguation

Rodent with a coat of sharp spines Wikidata

A large rodent with long quills that stand straight up when it is attacked or surprised. OmegaWiki

Any of several rodents of either of the taxonomic families Hystricidae (Old World porcupines) or Erethizontidae (New World porcupines), both from the infraorder Hystricognathi, noted for their sharp spines or quills, which are raised when the animal is attacked or surprised. Wiktionary

Large rodent. Wiktionary (translation)