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[From New Latin Hadrosaurus, genus name; see hadrosaurus.]


(ˈhædrəˌsɔː) or


(Palaeontology) any one of a large group of bipedal Upper Cretaceous dinosaurs of the genus Anatosaurus, Maiasaura, Edmontosaurus, and related genera: partly aquatic, with a duck-billed skull and webbed feet. Also called: duck-billed dinosaur
[C19: from Greek hadros thick, fat + -saur]


(ˈhæd rəˌsɔr)

any chiefly bipedal herbivorous dinosaur of the family Hadrosauridae, of the Cretaceous Period, having a broad toothless beak.
Also called duck-billed dinosaur.
[< New Latin Hadrosaurus (1858) genus name = Greek hadr(ós) thick, bulky + -o- -o- + saûros -saur]
had`ro•sau′ri•an, adj.


Any of various medium-sized to large plant-eating dinosaurs of the Cretaceous Period that had a duck-like bill, hoofed feet, and many series of rough grinding teeth. The hadrosaurs were the last group of ornithopod dinosaurs. Also called duck-billed dinosaur.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hadrosaur - any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feethadrosaur - any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic
ornithischian, ornithischian dinosaur - herbivorous dinosaur with a pelvis like that of a bird
family Hadrosauridae, Hadrosauridae - duck-billed dinosaurs; upper Cretaceous
anatotitan - one of the largest and most famous duck-billed dinosaurs
corythosaur, corythosaurus - duck-billed dinosaur with nasal passages that expand into a crest like a hollow helmet
edmontosaurus - duck-billed dinosaur from Canada found as a fossilized mummy with skin
trachodon, trachodont - large duck-billed dinosaur of the Cretaceous period
References in periodicals archive ?
Along with the hadrosaur remains, the Vega Island site has Yielded fossils of marine reptiles and a flock of four or five different birds, says Woodburne, the scientist in charge of the project.
Larry Heaman and colleagues found the bone of a hadrosaur as being only 64.
Fossil skins with similar features to that found in the Haman Formation are interpreted to represent the skin of a hadrosaur or sauropod dinosaur.
In the large collection of hadrosaur bones at the Tyrrell Museum, Tanke found several body parts that frequently displayed pathologies.
Jeyawati retains some primitive features of the teeth and jaws that preclude it from being a fully-fledged hadrosaur.
Horner has found hadrosaur nest sites in Montana that show hatchings remained in the nest and received food from attentive parents in a manner similar to birds.
The scientists, whose findings appear in the March 17 NATURE, studied 19 embryos of a previously undiscovered and unnamed type of hypsolophodontid dinosaur, along with seven hadrosaur embryos.
According to a report in New Scientist, Bill Sellers and his team used a laser scanner to create a 3D computer model of the skeleton of an Edmontosaurus, a type of hadrosaur or "duck-billed" dinosaur, and added virtual muscles to make it move.
There would have been no place on the coastal plain to park a hadrosaur body that reached a length of 9 meters (almost 30 feet) and weighed more than 3 tons.
The researchers came to the conclusion by studying the fossil record of a new hadrosaur, the Arenysaurus ardevoli, found in Huesca, Spain.
The most common dinosaur at the site is the plant-eating duck-billed dinosaur, or hadrosaur, which walked on its hind legs and stool as tall as 15 feet.
The well-preserved fossil of the plant-eating hadrosaur, complete with skin and tendons, was discovered in 1999.