Hedgehog

/ˈhejˌhôɡ/
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noun: hedgehog; plural noun: hedgehogs;

1. a small nocturnal Old World mammal with a spiny coat and short legs, able to roll itself

into a ball for defense.

2. any other animal covered with spines, especially a porcupine.

Origins  late Middle English: from hedge (from its habitat) + hog (from its piglike snout).