Elasmosaurus Skeleton Small 320×252 Medium 640×505 Large 1024×807 Download Tiff Original 2400×1892 | (493.8 KB) Description The skeleton of an elasmosaurus, a dinosaur in the order of plesiosaurs. Keywords dinosaur, dinosaur bones, elasmosaurus, extinct animal, Fossils, skeleton Galleries Dinosaurs Source: William Dwight Whitney The Century Dictionary: An Encyclopedic Lexicon of the English Language (New York, NY: The Century Co., 1911)