bra·chi·o·sau·rus 
(brā′kē-ə-sôrəs, brăk′ē-)
(brā′kē-ə-sôrəs, brăk′ē-)n.
A large brachiosaurid dinosaur of the genus Brachiosaurus of the Jurassic Period, with the nostrils and eyes set high up on the head. Also called brachiosaur.
[New Latin Brāchiosaurus, genus name : Latin brācchium, arm; see BRACHIUM + Greek sauros, lizard.]