: 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
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Merriam-Webster unabridged
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