rodent
Word family adjectiverodenticidalnounrodenticiderodent
ro·dent /ˈrəʊdənt $ ˈroʊ-/ noun [countableC] HBAany small animal of the type that has long sharp front teeth, such as a rat or a rabbit 啮齿动物〔如老鼠、兔子〕 Origin rodent (1800-1900) Latin present participle of rodere “to chew with the front teeth”