USED IN NATURAL HISTORY. 



35 



the power of burning or disor- 

 ganizing animal tissue. 



CAUSTICITY. Having a burning 

 quality. 



CAU'TERISE. To burn with a cau- 

 tery or red hot iron. To apply 

 caustic. 



CAVA. Lat. Hollow. Vena cava, 

 the hollow or deep seated vein. 

 A name given to the two great 

 veins of the body, which meet at 

 the right auricle of the heart. 



CAVK'HNOUS. fr.lat. cavus, a hollow. 

 Containing hollows; excavated. 

 Cavernous texture is a term applied 

 by geologists to aggregated com- 

 pound rocks, characterized by the 

 presence of numerous small ca- 

 vities of a roundish, oval or other 

 form, as in lava. 



CAVIA. Genus of rodents, including 

 the guinea-pig. 



CAVI'AR, or CAVIARE. A culinary 

 preparation, much used by certain 

 people, and made on the shores 

 of the Black and Caspian Seas, 

 from the roe or eggs of the stur- 

 geon, mixed with salt and other 

 condiments. 



CAVITA'RIA. fr. lat. cavitas, a hol- 

 low, a cavity. An order of En- 

 tozoa, in which the intestinal ca- 

 nal is contained in a distinct ab- 

 dominal cavity. 



CAWK. Opaque sulphate of baryta, 

 or vitriolated heavy spar. 



CELL. A cavity or compartment; 

 applied to a capsule or seed-ves- 

 sel. Each cavity in a pericarp 

 that contains one or more seeds, 

 is called a cell. The pericarp is 

 one-celled, two-celled, &c., ac- 

 cording to the number of cells it 

 contains. 



CEL'LULAR. Composed of cells. 

 Any mineral presenting nume- 

 rous small cells or cavities is 

 termed cellular. 



CELLULA'RES. A division of plants 

 having cells but not spiral vessels. 



CKMEKTA'TIOX. When a solid body 

 is surrounded by the powder of 



other substances, and the whole 

 heated tc redness, the process is 

 termed cementation. Iron is con- 

 verted into steel by cementation 

 with charcoal. 



CE'MENTED. Joined together by ce- 

 ment. 



CENOMY'CE. fr. gr. kenos, empty; 

 mukes, a diminutive fungus. A 

 kind of lichen. 



CE'NTIGRADE (Thermometer). fr 

 lat. centum, hundred ; gradus, a 

 degree. Division into a hundred 

 parts. The scale of the centi- 

 grade thermometer is made by 

 dividing the space between the 

 points of freezing, and boiling 

 water, into one hundred parts or 

 degrees. 



CE'NTIPED. fr. lat. centum, a hun- 

 dred ; pes, foot. A hundred legs ; 

 a genus of myriapods. 



CENTRE OF GRAVITY. The name 

 given to the point about which all 

 points of a body reciprocally bal- 

 ance each other. 



CENTRONO'TCS. Systematic name or 

 the pilot-fish. 



CEPHALA'NTHIUM. fr. gr. kephale, 

 head ; anthos, a flower. A head 

 of flowers. 



CEPHALA'SPIS (kef-ala'spis}. fr. gr. 

 kephale, head; aspis, shield. A 

 genus of fossil fishes, (p. 37, 

 Book viii). 



CEPHA'LIC. fr. gr. kephale, head. Be 

 longing or relating to the head. 



CEPH'ALOID. fr. gr. kephale, head ; 

 eidos, resemblance. Resembling 

 the head. 



CEPHA'LOPOD fr. gr. kephale, head; 

 pous, podos, a foot. Molluscous 

 animals whose mouth is sur- 

 rounded vith fleshy appendices 

 which serve them as feet. 



CE'PHALOPO'DA. Lat. Cephalopoda. 



CE'PHALO-THORAX. fr. gr. kephale, 

 head ; thorax, chest. That part 

 of the body of arachnidans, com 

 posed of the head and thorax. 



CEP'HALUS (ke'-fa^lus'). fr. gr. ke 

 phale, head, Systematic name of 



