Definitions of hedgehog
  1. noun
    small nocturnal Old World mammal covered with both hair and protective spines
    synonyms: Erinaceus europaeus, Erinaceus europeaeus
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    type of:
    small insect-eating mainly nocturnal terrestrial or fossorial mammals
  2. noun
    relatively large rodents with sharp erectile bristles mingled with the fur
    synonyms: porcupine
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    Old World porcupine
    terrestrial porcupine
    New World porcupine
    arboreal porcupine
    brush-tail porcupine, brush-tailed porcupine
    porcupine with a tuft of large beaded bristles on the tail
    Trichys lipura, long-tailed porcupine
    porcupine of Borneo and Sumatra having short spines and a long tail
    Canada porcupine, Erethizon dorsatum
    porcupine of northeastern North America with barbed spines concealed in the coarse fur; often gnaws buildings for salt and grease
    type of:
    gnawer, rodent
    relatively small placental mammals having a single pair of constantly growing incisor teeth specialized for gnawing
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