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deinonychus

n. a small bipedal dinosaur, genus ''Deinonychus'', of the Cretaceous period, characterized by having a large, curved claw on each hind foot.

WordNet
deinonychus

n. swift agile wolf-sized bipedal dinosaur having a large curved claw on each hind foot; of the Cretaceous

Wikipedia
Deinonychus

Deinonychus ( ; , 'terrible' and , genitive 'claw') is a genus of carnivorous dromaeosaurid coelurosaurian dinosaurs, with one described species, Deinonychus antirrhopus. This species, which could grow up to long, lived during the early Cretaceous Period, about 115–108 million years ago (from the mid- Aptian to early Albian stages). Fossils have been recovered from the U.S. states of Montana, Utah, Wyoming, and Oklahoma, in rocks of the Cloverly Formation, Cedar Mountain Formation and Antlers Formation, though teeth that may belong to Deinonychus have been found much farther east in Maryland.

Paleontologist John Ostrom's study of Deinonychus in the late 1960s revolutionized the way scientists thought about dinosaurs, leading to the " dinosaur renaissance" and igniting the debate on whether dinosaurs were warm-blooded or cold blooded. Before this, the popular conception of dinosaurs had been one of plodding, reptilian giants. Ostrom noted the small body, sleek, horizontal posture, ratite-like spine, and especially the enlarged raptorial claws on the feet, which suggested an active, agile predator.

"Terrible claw" refers to the unusually large, sickle-shaped talon on the second toe of each hind foot. The fossil YPM 5205 preserves a large, strongly curved ungual. In life, archosaurs have a horny sheath over this bone, which extends the length. Ostrom looked at crocodile and bird claws and reconstructed the claw for YPM 5205 as over long. The species name antirrhopus means "counter balance", which refers to Ostrom's idea about the function of the tail. As in other dromaeosaurids, the tail vertebrae have a series of ossified tendons and super-elongated bone processes. These features seemed to make the tail into a stiff counterbalance, but a fossil of the very closely related Velociraptor mongoliensis (IGM 100/986) has an articulated tail skeleton that is curved laterally in a long S-shape. This suggests that, in life, the tail could bend to the sides with a high degree of flexibility. In both the Cloverly and Antlers formations, Deinonychus remains have been found closely associated with those of the ornithopod Tenontosaurus. Teeth discovered associated with Tenontosaurus specimens imply they were hunted, or at least scavenged upon, by Deinonychus.

Deinonychus (band)

Deinonychus was a Dutch doom metal band formed in 1992 by Marco Kehren. There is a close relationship between Deinonychus and the German band Bethlehem: Kehren provided vocals on S.U.I.Z.I.D., Reflektionen auf's Sterben and Profane Fetmilch Lenzt Elf Krank, while Bethlehem bassist and lyricist Jürgen Bartsch joined Deinonychus in 2005. The first three albums and the early demos released as After the rain falls...an empty sky remains feature Kehren on all instruments and vocals; 1999's Deinonychus added Cradle of Filth drummer William Sarginson, and 2002's Mournument was recorded with a full band. The band announced that they disbanded in September 2008. Marco Kehren nowadays runs a martial industrial band by the name of Nihil Novi Sub Sole (Band). Warfare

Usage examples of "deinonychus".

In its other hand, a knobby three-fingered one, it held the end of a leash, and straining at the leash’s far end was a something that looked more like the stuffed deinonychus at Natural History than anything Dairine had ever seen.

No kicks, she told herself, if one kick doesn’t take this thing out, you’ll never have time for a second-It leapt at her, but she was already swinging: Dairine hit the deinonychus right in the face with the computer and felt something crunch.

Oh, please don t let it be the plastic, she thought, and then the impetus of the deinonychus carried it right into her, its broken jaw knocked against her face as it fell, she almost fell with it.

They watched Dairine deal with the deinonychus, and afterward with the BEM that grabbed her.

The deinonychus with the box went first, and the others followed behind, hissing softly as they went.

That’s the problem, of course, she thought as she used it for the second time, and the third, and the fourth, and as Urruah got up, his jaws running with the pinkish-tinged saurian blood, and launched himself at another saurian, a deinonychus that was in the act of jumping at Saash from behind.

Theropod skeletons, like the Deinonychus, were rare enough to be noteworthy, but fully-articulated skeletons—skeletons that had remained pretty much connected as they had been in life—were vanishingly rare.

All five skeletons were fully articulated, possibly the finest specimens of Deinonychus ever uncovered—and all of them were sitting on a stippled red and purple layer that was the K-T boundary itself.

Theropod skeletons, like the Deinonychus , were rare enough to be noteworthy, but fully-articulated skeletons—skeletons that had remained pretty much connected as they had been in life—were vanishingly rare.

His eyes closed and he could see them moving now, not just the crummy dinosaurs you could see on TV but the special ones: the tiny, vicious deinonychus, the "terrible claw.

Deinonychus is the name of the dinosaur that had a wrist joint that looks the same as the wing joint in the Archeopteryx, and the Archeopteryx has feathers and wings, hence is seen as the first bird.