CORPUSCLE n.
other matters. In most mammals the red corpuscles are circular, but in the camels, birds, reptiles, and the lower vertebrates generally, they are oval, and sometimes more or less spherical in form. In Amphioxus, and most invertebrates, the blood corpuscles are all white or colorless. -- White blood corpuscles (Physiol…
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 c…
DINOSAURIA n.
An order of extinct mesozoic reptiles, mostly of large size (whence the name). Notwithstanding their size, they present birdlike characters in the skeleton, esp. in the pelvis and hind limbs. Some walked on their three-toed hind feet, thus producing the large "bird tracks," so-called, of mesozoic sandstones; others wer…
DUCK n.
us). It belongs the subclass Monotremata and is remarkable for laying eggs like a bird or reptile; -- called also duckbill, platypus, mallangong, mullingong, tambreet, and water mole. -- To make ducks and drakes, to throw a flat stone obliquely, so as to make it rebound repeatedly from the surface of the water, raisin…
EXOSKELETON n.
ng hair, feathers, nails, horns, scales, etc.,as well as the armor of armadillos and many reptiles, and the shells or hardened integument of numerous invertebrates; external skeleton; dermoskeleton.