Paleontology. a genus of two-legged, herbivorous dinosaurs with distinctively thick, domed skulls edged with bony bumps and spikes.
(pachycephalosaurus) a dinosaur of the genus Pachycephalosaurus.
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At the Wednesday auction, which featured more than 100 items, a Ceratosaurus skeleton from the late Jurassic period sold for $26m and the skull of a Pachycephalosaurus sold for $1.4m.
From BBC • Jul. 16, 2025
And there’s a possibility that the hadrosaurs and dome-headed Pachycephalosaurus found at the top of the formation differ significantly from those at the bottom.
From New York Times • Feb. 28, 2022
But it isn’t really known whether Stygimolochs existed: Horner believes the fossils found were just juveniles of another dinosaur called Pachycephalosaurus.
From The Verge • Jun. 19, 2018
And some dinosaur names are real doozies: Tyrannosaurus rex, Pachycephalosaurus, Parasaurolophus, the list goes on and on.
From Scientific American • Sep. 19, 2012
If this were an Indiana Jones movie, he would smash into something wonderful at the bottom -- the skull of a Pachycephalosaurus, say.
From Time Magazine Archive
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
