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rodent

noun
🔊/ˈrəʊdnt/
🔊/ˈrəʊdnt/
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  1. any small animal that belongs to a group of animals with strong sharp front teeth. Mice, rats and squirrels are all rodents.啮齿动物
    Topics Animalsc1
    Word Originmid 19th cent.: from Latin rodent- ‘gnawing’, from the verb rodere.