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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 ?
In addition to the fossils found in the Iberian Peninsula, hadrosaur fossils have been found in the Netherlands, which date back to Late Cretaceous, "although the material is more fragmented than those found in Huesca and Lleida," added Pereda-Suberbiola.
The well-preserved fossil of the plant-eating hadrosaur, complete with skin and tendons, was discovered in 1999.
The samples included the claw of a meat-eating dinosaur, a few toe bones from a ceratopsid (a group that included the horned Triceratops) and a duck-billed hadrosaur, and rib fragments from an unknown species.
Paleontologists said they have uncovered 50 vertebrae of Mexico''s first complete dinosaur tail of what they believe may be the remains of a Hadrosaur or crested duckbill dinosaur.
Surrounded by Viking swords, hadrosaur skeletons, Egyptian mummies, and ancient Daoist murals, with two towering totem poles just to the east, the ROM provided the perfect setting for an occasion celebrating diversity of cultures.
Reports in recent years of soft dinosaur tissue from fossil bones of a T rex and a duck-billed hadrosaur elicited skepticism from the scientific community.
Some of the more fascinating fossils consist of the head of a Triceratops which is around 68 million years old, the head of an Ichthyosaurus which is around 200 million years old and a complete nest of the Hadrosaur, which is around 144 to 165 million years old.
Most of the specimens recovered from the quarry belong to a gigantic species of hadrosaur, or duck-billed dinosaur.
The new exhibit also officially displays our hadrosaur bones, which were on loan for research and only recently returned.
Paleontologists in North Dakota recently made a rare discovery: a 66 million-year-old hadrosaur skeleton with fossilized skin still attached.
These include Leidy's Hadrosaur specimen, assembled for display in lifelike pose by Benjamin Waterhouse Hawkins in 1868, and Charles Willson Peale's travelling mastodon exhibit of the early 1800s.
Sue's close cousin, Daspletosaurus, hunches over the body of a duck-billed Hadrosaur.