ornithopod
noun
or·nith·o·pod ȯr-ˈni-thə-ˌpäd 
ˈȯr-ni-thə-
ˈȯr-ni-thə- : any of a suborder (Ornithopoda) of bipedal ornithischian dinosaurs (such as a hadrosaur) with digitigrade walking limbs usually having only three functional toes
Example Sentences
Recent Examples on the Web Inside the stomach of the 2.5 meter-long crocodile, scientists identified the partly digested remnants of a young ornithopod, according to a paper naming the new species published in the scientific journal Gondwana Research on February 11. 
Sana Noor Haq, CNN, 14 Feb. 2022 Pentland said that the Winton area, which is now comprised of sheep and cattle farms, was full of long-necked sauropods, carnivorous theropods (including T. rex), ankylosaurs, ornithopods, as well as pterosaurs. Fox News, 3 Oct. 2019 The museum holds Australia’s largest opalized dinosaur skeleton, a portion of an ornithopod’s spine, skull, limbs and ribs, still partly encased in clay. Michelle Innis, New York Times, 5 July 2016 Two limb bones — one from a subadult ornithopod dinosaur, and the other from a juvenile ornithopod dinosaur — show tooth marks. Brian Switek, WIRED, 2 Mar. 2012
Sana Noor Haq, CNN, 14 Feb. 2022 Pentland said that the Winton area, which is now comprised of sheep and cattle farms, was full of long-necked sauropods, carnivorous theropods (including T. rex), ankylosaurs, ornithopods, as well as pterosaurs. Fox News, 3 Oct. 2019 The museum holds Australia’s largest opalized dinosaur skeleton, a portion of an ornithopod’s spine, skull, limbs and ribs, still partly encased in clay. Michelle Innis, New York Times, 5 July 2016 Two limb bones — one from a subadult ornithopod dinosaur, and the other from a juvenile ornithopod dinosaur — show tooth marks. Brian Switek, WIRED, 2 Mar. 2012 Word History
Etymology
ultimately from Greek ornith- + pod-, pous foot — more at foot
First Known Use
circa 1889, in the meaning defined above