The Collaborative International Dictionary of English v.0.48:

Sauropoda \Sau*rop"o*da\, n. pl. [NL., fr. Gr. ? a lizard +
   -poda.] (Paleon.)
   An extinct order of herbivorous dinosaurs having the feet of
   a saurian type, instead of birdlike, as they are in many
   dinosaurs. It includes the largest known land animals,
   belonging to Brontosaurus, Camarasaurus, and allied genera.
   See Illustration in Appendix.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Sauropoda
    n 1: any of the sauropod dinosaurs [syn: Sauropoda, suborder
         Sauropoda]