/bray"kee euh sawr', brak"ee-/ , n.
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).
[ Brachiosaurus (1903); see BRACHIO-, -SAUR; so named in allusion to the unusual length of the humerus relative to the femur ]