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Pecten :: Pecten (n.) A vascular pigmented membrane projecting into the vitreous humor within the globe of the eye in birds, and in many reptiles and fishes; -- also called marsupium..

Ichthyosauria :: Ichthyosauria (n. pl.) An extinct order of marine reptiles, including Ichthyosaurus and allied forms; -- called also Ichthyopterygia. They have not been found later than the Cretaceous period..

Sauropsida :: Sauropsida (n. pl.) A comprehensive group of vertebrates, comprising the reptiles and birds..

Dicynodont :: Dicynodont (n.) One of a group of extinct reptiles having the jaws armed with a horny beak, as in turtles, and in the genus Dicynodon, supporting also a pair of powerful tusks. Their remains are found in triassic strata of South Africa and India..

Chelonia :: Chelonia (n. pl.) An order of reptiles, including the tortoises and turtles, peculiar in having a part of the vertebrae, ribs, and sternum united with the dermal plates so as to form a firm shell. The jaws are covered by a horny beak. See Reptilia; also, Illust. in Appendix..

Orthopoda :: Orthopoda (n. pl.) An extinct order of reptiles which stood erect on the hind legs, and resembled birds in the structure of the feet, pelvis, and other parts..

Ophiophagous :: Ophiophagous (a.) Feeding on serpents; -- said of certain birds and reptiles.

Suchwise :: Suchospondylous (a.) Having dorsal vertebrae with long and divided transverse processes; -- applied to certain reptiles.

Biauriculate :: Biauriculate (a.) Having two auricles, as the heart of mammals, birds, and reptiles..

Mosasauria :: Mosasauria (n. pl.) An order of large, extinct, marine reptiles, found in the Cretaceous rocks, especially in America. They were serpentlike in form and in having loosely articulated and dilatable jaws, with large recurved tteth, but they had paddlelike feet. Some of them were over fifty feet long. They are, essentially, fossil sea serpents with paddles. Called also Pythonomarpha, and Mosasauria..

Scaled :: Scaled (a.) Covered with scales, or scalelike structures; -- said of a fish, a reptile, a moth, etc..

Transpalatine :: Transpalatine (a.) Situated beyond or outside the palatine bone; -- said of a bone in the skull of some reptiles.

Worm :: Worm (n.) Any small creeping animal or reptile, either entirely without feet, or with very short ones, including a great variety of animals; as, an earthworm; the blindworm..

Hibernate :: Hibernate (v. i.) To winter; to pass the season of winter in close quarters, in a torpid or lethargic state, as certain mammals, reptiles, and insects..

Crocodile :: Crocodile (n.) A large reptile of the genus Crocodilus, of several species. They grow to the length of sixteen or eighteen feet, and inhabit the large rivers of Africa, Asia, and America. The eggs, laid in the sand, are hatched by the sun's heat. The best known species is that of the Nile (C. vulgaris, or C. Niloticus). The Florida crocodile (C. Americanus) is much less common than the alligator and has longer jaws. The name is also sometimes applied to the species of other related genera, as th

Amniota :: Amniota (n. pl.) That group of vertebrates which develops in its embryonic life the envelope called the amnion. It comprises the reptiles, the birds, and the mammals..

Vent :: Vent (n.) The anal opening of certain invertebrates and fishes; also, the external cloacal opening of reptiles, birds, amphibians, and many fishes..

Brontosaurus :: Brontosaurus (n.) A genus of American jurassic dinosaurs. A length of sixty feet is believed to have been attained by these reptiles.

Reptant :: Reptant (a.) Creeping; crawling; -- said of reptiles, worms, etc..

Theriodontia :: Theriodontia (n. pl.) An extinct order of reptiles found in the Permian and Triassic formations in South Africa. In some respects they resembled carnivorous mammals. Called also Theromorpha.

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