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Tyrannosaurus

Tyrannosaurus (tīrăn´ōsôr´əs, tĬr–) [Gr.,=tyrant lizard], member of a family, Tyrannosauridae, of bipedal carnivorous saurischian dinosaurs characterized by having strong hind limbs, a muscular tail, and short forelimbs. Tyrannosaurids are theropods, having three toes on the hind feet. The oldest known tyrannosaurids lived approximately 120 million years ago. Fossilized bones have been found in Asia, North America, and Australia. The family includes Albertosaurus,Tarbosaurus, and Tyrannosaurus.

The best known species is the huge North American Tyrannosaurus rex, which lived around 70 million years ago. The largest were an estimated 39 ft (12 m) in total length and weighed around 10 tons. They had an elongated skull and large, spike-shaped teeth in jaws that could open to a 4-ft (122-cm) gape. Like the other tyrannosaurids, the short forelimbs had two fingers armed, like the three digits of the powerful hind limbs, with sharp, curved claws; on the foot was a spurred toe not reaching to the ground. T. rex is believed to have existed only for a short time in the late Cretaceous period and to have dominated the North American continent at that time; fossil remains have been found in the W United States.

For many years T. rex was believed to be the largest carnivorous dinosaur, but this honor was challenged by the 1995 discovery of the 42.6-ft (13-m) Giganotosaurus carolinii in Patagonia, the 1996 discovery of the 45-ft (13.7-m) Carcharodontosaurus saharicus in the Moroccan Sahara, and subsequent finds. Remains of a second Tyrannosaurus species, T. bataar, have been found in Mongolia. It was a contemporary of T. rex, but was somewhat smaller and had a comparatively smaller head and shorter arms.

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"Tyrannosaurus." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 23 Oct. 2017 <http://www.encyclopedia.com>.

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tyrannosaurus

tyrannosaurus Any of several species of large, bipedal, carnivorous, theropod dinosaurs that lived during late Cretaceous times. Its head, 1.2m (4ft) long, was armed with a series of dagger-like teeth. The hind legs were stout and well developed, but the forelegs may have been useless except for grasping at close range. The best-known species is T. rex. Length: 14m (47ft); height: 6.5m (20ft).

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tyrannosaur

ty·ran·no·saur / təˈranəˌsôr/ (also tyrannosaurus / təˌranəˈsôrəs/ ) • n. a very large bipedal carnivorous dinosaur (family Tyrannosauridae, infraorder Carnosauria, suborder Theopoda) of the late Cretaceous period, with powerful jaws and small clawlike front legs.

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Tyrannosaurus rex

Tyrannosaurus rex (order Saurischia, suborder Theropoda) A giant, carnivorous dinosaur which lived during the Upper Cretaceous in N. America and possibly in Asia. Individuals grew to 12 m in length, 5 m tall, and weighed about 7 tonnes. The name means ‘king of the tyrant lizards’, but T. rex was probably a scavenger with a top speed of 16–40 km/h.

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tyrannosaur

tyrannosaur a very large bipedal carnivorous dinosaur of the late Cretaceous period, with powerful jaws and small claw-like front legs; Tyrannosaurus rex is the best-known species. The name is modern Latin, and is formed from Greek turannos ‘tyrant’ + sauros ‘lizard’, on the pattern of dinosaur.

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Tyrannosaurus rex

Tyrannosaurus rex Giant, carnivorous dinosaur which lived during the Upper Cretaceous in N. America and possibly in Asia. Individuals grew to 12 m in length, 5 m tall, and weighed about 7 tonnes. The apt name means ‘king of the tyrant lizards’.

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"Tyrannosaurus rex." A Dictionary of Earth Sciences. . Encyclopedia.com. 23 Oct. 2017 <http://www.encyclopedia.com>.

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"Tyrannosaurus rex." A Dictionary of Earth Sciences. . Retrieved October 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/tyrannosaurus-rex

tyrannosaurus

tyrannosaurusArras, embarrass, harass •gynandrous, polyandrous •Pancras • charas • Tatras • disastrous •ferrous • leprous • ambidextrous •Carreras, mayoress •scabrous •cirrus, Pyrrhus •chivalrous •citrous, citrus •ludicrous • tenebrous •Cyrus, Epirus, papyrus, virus •fibrous • hydrous • Cyprus •retrovirus • monstrous •brachiosaurus, brontosaurus, canorous, chorus, Epidaurus, Horus, megalosaurus, pelorus, porous, sorus, stegosaurus, Taurus, thesaurus, torus, tyrannosaurus •walrus •ochrous (US ocherous) •cumbrous • wondrous • lustrous •Algeciras, Severus •desirous •Arcturus, Epicurus, Honduras •barbarous • tuberous • slumberous •Cerberus • rapturous •lecherous, treacherous •torturous • vulturous • Pandarus •slanderous • ponderous •malodorous, odorous •thunderous • murderous •carboniferous, coniferous, cruciferous, melliferous, odoriferous, pestiferous, somniferous, splendiferous, umbelliferous, vociferous •phosphorous, phosphorus •sulphurous (US sulfurous) •Anaxagoras, Pythagorasclangorous, languorous •rigorous, vigorous •dangerous • verdurous •cankerous, cantankerous, rancorous •decorous • Icarus • valorous •dolorous • idolatrous •amorous, clamorous, glamorous •timorous •humerus, humorous, numerous •murmurous • generous • sonorous •onerous • obstreperous • Hesperus •vaporous • viviparous • viperous •Bosporus, prosperous •stuporous • cancerous •Monoceros, rhinoceros •sorcerous • adventurous • Tartarus •nectarous • dexterous • traitorous •preposterous • slaughterous •boisterous, roisterous •uterus • adulterous • stertorous •cadaverous • feverous •carnivorous, herbivorous, insectivorous, omnivorous •Lazarus

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