单词	hadrosaurid
释义	hadrosaurid noun had·​ro·​sau·​rid ˌha-drə-ˈsȯr-əd  plural hadrosaurids : hadrosaur, duck-billed dinosaur Like ceratopsians, they too had closely packed chewing teeth, but by the time hadrosaurids evolved, the dentition consisted of relatively small teeth that were organized into a complex battery, all the better for grinding up vegetation. David B. Weishampel, Natural History, June 1995 hadrosaurid adjective … members of the hadrosaurid family apparently nurtured their young. Richard Monastersky, Science News, 22 Oct. 1988 Word History First Known Use circa 1893, in the meaning defined above
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