Definition of triceratops
: any of a genus (Triceratops) of large herbivorous quadrupedal ceratopsian dinosaurs of the Late Cretaceous with three horns, a bony hood or crest on the neck, and hoofed toes
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Merriam-Webster unabridged
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Time Traveler for triceratops
The first known use of triceratops was in 1892
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