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Definition of hedgehog noun from the Oxford Advanced Learner's Dictionary

hedgehog

noun
 
/ˈhedʒhɒɡ/
 
/ˈhedʒhɔːɡ/
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  1. a small brown animal with stiff parts like needles (called spines) covering its back. Hedgehogs are nocturnal (= active mostly at night) and can roll into a ball to defend themselves when they are attacked.Topics Animalsc2
    Word Originlate Middle English: from hedge (from its habitat) + hog (from its piglike snout).
See hedgehog in the Oxford Advanced American Dictionary
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