a plant-eating sauropod dinosaur of the genus Camarasaurus and closely related genera, having a small head, long neck, and short forelimbs, and reaching a length of 40 ft. (12.2 m); until 1981 the type specimen of Brontosaurus excelcus was wrongly reconstructed with a Camarasaurus skull
Word origin
[‹ NL Camarasaurus (1877), irreg. ‹ Gk kamára space enclosed by an arch, vault (cf. chamber) + -saurus-saur]