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Rodentia 嚙齒目 嚙齒目 Rodentia n 1: small gnawing animals: porcupines; rats; mice; squirrels; marmots; beavers; gophers; voles; hamsters; guinea pigs; agoutis [synonym: {Rodentia}, {order Rodentia}] Rodentia \Ro*den"ti*a\, n. pl. [NL. See {Rodent}, a.] (Zool.)
An order of mammals having two (rarely four) large incisor teeth in each jaw, distant from the molar teeth. The rats, squirrels, rabbits, marmots, and beavers belong to this order. [1913 Webster] Note: The incisor teeth are long, curved, and strongly enameled on the outside, so as to keep a cutting edge. They have a persistent pulp and grow continuously. [1913 Webster]
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