Noun
any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
Source: WordNetOriginally identified as a hadrosaur, this specimen consists only of post-cranial remains and is only provisionally considered an example of Triceratops. Source: Internet
Since the first, two more tyrannosaurs and a hadrosaur have also been found to have such tissue-like structures. Source: Internet