pachycephalosaurus
[ păk′ĭ-sĕf′ə-lə-sôr′əs ]
A large herbivorous dinosaur of the genus Pachycephalosaurus of the late Cretaceous Period. It grew to about 7.6 m (25 ft) long and had a domed skull up to 25.4 cm (10 inches) thick that was lined with small bumps and spikes. The thick skull may have been used for head-butting during mating displays.
Words nearby pachycephalosaurus
pachouli, pachuca, pachuco, pachy-, pachyblepharon, pachycephalosaurus, pachycephaly, pachycheilia, pachychromatic, pachydactyly, pachyderm
The American Heritage® Science Dictionary
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