di·plod·o·cus 
(dĭ-plŏdə-kəs, dī-)
(dĭ-plŏdə-kəs, dī-)n.
A very large herbivorous sauropod dinosaur of the genus Diplodocus of the Jurassic Period, having a long neck and tail and a small head, and hind legs longer than the front legs.
[New Latin Diplodocus, genus name : Greek diplo-, diplo- + Greek dokos, beam; see dek- in the Appendix of Indo-European roots.]