brachiosaur

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bra·chi·o·saur / ˈbrākēəˌsôr; ˈbrak-/ (also brachiosaurus / ˌbrākēəˈsôrəs; ˌbrak-/ ) • n. a huge herbivorous dinosaur (genus Brachiosaurus, order Saurischia) of the late Jurassic to mid Cretaceous periods, with forelegs much longer than the hind legs.DERIVATIVES: bra·chi·o·sau·ri·an / -ˈsôrˈēən/ adj.