bra·chi·o·saur  (brā'kē-ə-sôr', brāk'ē-)  n. Any of various massive, herbivorous sauropod dinosaurs of the genus Brachiosaurus of the Jurassic and Cretaceous Periods, having a long flexible neck, nostrils above the eyes, and forelegs that were much longer than the hind legs. [New Latin Brāchiosaurus, genus name : Latin brācchium, arm; see brachium + Greek sauros, lizard.] |
| 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. |