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hadrosaur

[had-ruh-sawr] /ˈhæd rəˌsɔr/
noun
1.
a bipedal dinosaur of the genus Hadrosaurus, belonging to the ornithopod family Hadrosauridae of the late Cretaceous Period, having broad, flat jaws for scooping up water plants.
Also called duck-billed dinosaur.
Origin
< Neo-Latin Hadrosaurus (1858) genus name, equivalent to Greek hadr(ós) thick, bulky + -o- -o- + saûros -saur
Related forms
hadrosaurian, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for hadrosaur
  • We were excavating dinosaur bones from three dinosaurs at once: a triceratops, a hadrosaur, and one as yet unidentified.
  • The amount of skin indicates how muscular the hadrosaur was and, consequently, how fast it could run.
British Dictionary definitions for hadrosaur

hadrosaur

/ˈhædrəˌsɔː/
noun
1.
any one of a large group of bipedal Upper Cretaceous dinosaurs of the genus Anatosaurus, Maiasaura, Edmontosaurus, and related genera: partly aquatic, with a duck-billed skull and webbed feet Also called duck-billed dinosaur
Word Origin
C19: from Greek hadros thick, fat + -saur
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for hadrosaur
n.

1877, from Modern Latin hadrosaurus, from Greek hadros "thick, stout" (see hadron) + -saurus.

Online Etymology Dictionary, © 2010 Douglas Harper
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hadrosaur in Science
hadrosaur
  (hād'rə-sôr')   
Any of various medium-sized to large dinosaurs of the group Hadrosauroidea of the Cretaceous Period. Hadrosaurs had a duck-like bill and a mouth containing many series of rough grinding teeth for chewing tough plants. They walked on two legs or on all fours and had hoofed feet. Many hadrosaurs bore hollow crests on their skulls. They were the last and largest ornithopod dinosaurs. Also called duck-billed dinosaur.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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