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单词 jawless
释义 ˈjawless, a.
[f. jaw n.1 + -less.]
Without jaws; spec. without a lower jaw, as the lamprey.
1708Motteux Rabelais iv. xv. (1737) 60 The jawless Bum shrug'd up his Shoulders.1968Times 19 Dec. 4/8 Lampreys, like hagfish, are surviving members of the jawless fishes, the first group of vertebrates to evolve.1972Sci. Amer. Nov. 61/3 Primitive jawless ostracoderms belonging to the orders Anaspida and Thelodonti.
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