had·ro·saur

(hăd′rə-sôr′)

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

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

hadrosaur

(ˈhædrəˌsɔː) or

hadrosaurus

(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]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

had•ro•saur

(ˈhæd rəˌsɔr)

n.

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.

had·ro·saur

(hăd′rə-sôr′)

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.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

hadrosaur - any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic

duck-billed dinosaur, hadrosaurus

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

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References in periodicals archive

Researchers from the Universities of Bristol and the Catalan Institute of Paleontology in Barcelona used a large database describing morphological variety in hadrosaur fossils and computational methods that quantify morphological variety and the pace of evolution.

Chewing Versus Sex in Duck-Billed Dinosaurs

Smit noted that the buried body of a Triceratops and a duck-billed hadrosaur proved without a doubt dinosaurs were still walking the Earth at the time of the impact believed to have caused the mass extinction.

Prehistoric 'killing field' found full of perfectly preserved dinosaur fossils; A dig in modern-day North Dakota has uncovered a 66-million-year-old 'fossilised graveyard' - including a Triceratops

Parasaurolophus is a large type of hadrosaur, a so-called "duck-billed dinosaur".

Walking with dinosaurs; Dinosaurs are taking over Cardiff's Bute Park this weekend as Jurassic Kingdom heads to the Welsh capital. Joshua Knapman discovers what creatures visitors can see

The Coon Creek Formation Lagerstatte preserves a diverse ecosystem of unaltered shelly invertebrates, swimming reptiles, and rare hadrosaur bone and teeth.

Abstracts of Presentations at the 2017 (127th) Annual Meeting of the Tennessee Academy of Science

She located it amid the stones, and I came over to where she was squatting, inspecting the bulbous, rough-surfaced three-toed track of a hadrosaur. At least 15 inches long, it was evidence of an animal bigger than any I had ever seen, dead or alive.

Where the wild things were: Denali paleontologists brave blizzards and bears to find fossils that could challenge what we know about dinosaurs

Eight years ago, Tweet and colleagues reported the probable stomach contents of a hadrosaur (Brachylophosaurus canadensis) nicknamed Leonardo.

Parasites wormed way into dino's gut

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.

Scientists hunt for dinosaur blood

(2012): New hadrosaur remains from the Late Maastrichtian of Huesca (NE Spain).

Presence of diminutive hadrosaurids (Dinosauria: Ornithopoda) in the Maastrichtian of the south-central Pyrenees (Spain)

As only a single indeterminate fossil was found, no phylogenetic comparisons between this hadrosaur and contemporaneous forms in Europe and southern Appalachia can be made.

A hadrosaurid (dinosauria: ornithischia) from the late cretaceous (campanian) Kanguk formation of Axel Heiberg Island, Nunavut, Canada, and its ecological and geographical implications

Vavrek: It's a duck-billed hadrosaur. We know the general group it's in, but because most of it was still inside of the rock we can't really tell.

Tourmaline pipeline team uncovers gigantic dinosaur fossil in Alberta

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.

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