Ornithopoda is a term used to describe a group of herbivorous, bipedal dinosaurs that lived during the late Cretaceous period. Known for their bird-like features, including a toothless beak and bird-like hips, these dinosaurs were some of the most abundant and successful herbivores of their time. Synonyms for Ornithopoda include "bird-footed dinosaurs," "duck-billed dinosaurs," and "hadrosaurs." The latter term comes from the Greek word "hadros," which means thick or bulky, and accurately describes the bulky appearance of these dinosaurs. Other synonyms for Ornithopoda include "iguanodonts" and "hypsilophodonts," which refer to subgroups of the larger Ornithopoda family. Regardless of their names, these fascinating dinosaurs continue to capture the imaginations of paleontologists and dinosaur enthusiasts alike.