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.

plural of porcupine

Miscanthus sinensis (Chinese silver grass, zebra grass) / Stipa spartea (now Hesperostipa spartea) / Triodia species

A North American porcupine (Erethizon dorsatum).

plural of Canadian porcupine

Any of several tropical fish species in the family Diodontidae that are covered with sharp spines and inflate themselves when threatened.

A pufferfish of the families Diodontidae or Tetraodontidae.

plural of porcupine puffer

Any porcupine fish of the genus Diodon.

plural of sea porcupine