brachiosaurus

World English Dictionary
brachiosaurus (ˌbreɪkɪəˈsɔːrəs, ˌbræk-)
 
n
See also sauropod a dinosaur of the genus Brachiosaurus, up to 30 metres long: the largest land animal ever known

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

brachiosaurus
1903, Mod.L., from Gk. brakhion "arm" (see brachio-) + sauros "lizard." The forelegs are longer than the hind legs.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
brachiosaurus (brā'kē-ə-sôr'əs) or brachiosaur   (brā'kē-ə-sôr'əs)  Pronunciation Key 
A very large sauropod dinosaur of the genus Brachiosaurus of the Jurassic and Cretaceous Periods. It had forelegs that were longer than its hind legs, and nostrils on top of its head.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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