Meaning of brachiosaur

bra•chi•o•saur

Pronunciation: (brā'kē-u-sôr", brak'ē-), [key]
— n.
  1. a huge sauropod dinosaur of the genus Brachiosaurus, having a small head with nostrils on a knob above the eyes, long forelegs, and a sloping, massive body, and reaching a length of about 80 ft. (24 m).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.