| 单词 | hadrosaurid | 
| 释义 | hadrosauridnoun  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.  hadrosaurid adjective    … members of the hadrosaurid family apparently nurtured their young.     | 
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