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The typical pentadactyloid limb of the higher vertebrates.

order of reptiles, including the tortoises and turtles, perculiar in having a part of the vertebræ, 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.

group of moldings, common in Norman architecture. Chevron bones (Anat.), The V-shaped subvertebral arches which inclose the caudal blood vessels in some animals.

Having a narrow, projecting chest, caused by forward curvature of the vertebral column.

s attached laterally to each segment; well developed jaws; and a pair of thoracic legs converted into poison fangs. They are insectivorous, very active, and some species grow to the length of a foot.

orming the harder part of the outer integument of insects, crustacea, and various other invertebrates; entomolin.

taurocholic and glycocholic acids in the bile, and extracted as a resinous substance, convertible under the influence of ether into white crystals.

To convert, or be converted, into cartilage.

The chemical basis of cartilage, converted by long boiling in water into a gelatinous body called chondrin.

ar cartilage, cartilaginous; as, the chondrocranium, the cartilaginous skull of the lower vertebrates and of embryos.

A comprehensive division of animals including all Vertebrata together with the Tunicata, or all those having a dorsal nervous cord.

The act or process of converting or being converted to a true Christianity.

To make Christian; to convert to Christianity; as, to Christianize pagans.

Producing, or converting into, chyle; having the power to form chyle.

To make chyle of; to be converted into chyle.

excessive or long-continued use of quinine, and marked by deafness, roaring in the ears, vertigo, etc.

repeating itself; ending in itself; reverting to the point of beginning; hence, illogical; inconclusive; as, circular reasoning.

The lowest group of vertebrates; -- so called from the cirri around the mouth; the Leptocardia. See Amphioxus.

free. [He that clears at once will relapse; for finding himself out of straits, he will revert to the customs; but he that cleareth by degrees induceth a habit of frugality. Bacon.

octahedron, dodecahedron, or rhombohedron. -- Prismatic cleavage, cleavage parallel to a vertical prism.