pro·saur·o·pod 
(pr
ō′sôr
ə-p
ŏd
′)
n. Any of various saurischian dinosaurs of the group Prosauropoda of the Triassic and Jurassic Periods, having a small head, long neck and tail, serrated teeth, and large thumb claw, and including plateosaurus.
[New Latin Prōsauropoda, group name : Greek pro-, before; see PRO-2 + New Latin Sauropoda, group name; see SAUROPOD.]
pro′sauro·pod′ adj.