CENTRIFUGAL 



CERES 



acted by a single force. C. of gravity: the 

 point of a body round which its weight is 

 balanced. 



Centrifugal force, (sen-trif'u-gal). [L. cen- 

 trum, centre ; fuyio, I fly from.] The force 

 which impels a revolving body away from 

 the centre of its orbit. 



Centripetal force, (sen-trip'e-tal). [L. centrum, 

 centre ; peto, I seek.] The force which im- 

 pels a revolving body towards the ceutre of 

 its orbit. 



Centriscus, (sen-trisTms). A fish having a 

 tubular snout. C. scoZopaaj=:Bellows-fish= 

 Trumpet-fish. 



Centroscymnus, (sen-tro-sim'nus). C. calo- 

 lepis : a shark found oft' the coast of Portu- 

 gal, at a depth of more than 400 fathoms. 



Centrum, (sen'trum). [The Latin word.] The 

 main body of a vertebra. 



Centunculus, (sen-tun'ku-lus)=Bastard pim- 

 pernel : a small herb belonging to Primu- 

 lacese. 



Cephalanthera, (sef-a-lan'ther-a). [Gk. 

 kephale, head ; and anthos, flower. ]=Helle- 

 borine. 



Cephalaspis, ( sef-a-las'pis ). [Gk. kephale, 

 head ; aspis, shield. ] = Buckler head : a 

 ganoid fish, known only by remains found 

 in Old Red Sandstone. 



Cephalic, (se-fal'ik). [Gk. kephale, head.] 

 relating to the head. C. index : the ratio 

 of the transverse to the longitudinal diame- 

 ter of the skull. 



Cephalo, (sef'al-o). [Gk. kepMle, head.] A 

 prefix meaning head. C. branchiata = 

 Tubicola, q.v. C. thorax=T!he amalgamated 

 head and thorax in Arachuida and Crus- 

 tacea. 



Cephalophora, (sef-al-of'o-ra). [Gk. kephale, 

 head ; phoreo, I bear.] 1. Used by De Blain- 

 ville and Burmeister as a term for Cephalo- 

 poda and Gasteropoda. 2. A primary divi- 

 sion of Mollusca, also called Encephala and 

 Odontophora. 3. A plant belonging to 

 Asteracese. 



Cephalopoda, (sef-al-op'o-da). [Gk. kephale, 

 head ; pous, foot.]=Cuttle-fishes, &c. : ma- 

 rine carnivorous animals, forming the highest 

 division of Mollusca, divided into Dibran- 

 chiata, more highly, and Tetrabranofdata, 

 less highly organised ; the foot is developed 

 into long tentacles, often with suckers. 

 Placed by M'Leary between Vertebrata and 

 Mollusca. 



Cephalotacese, (sef-al-o-ta'se-e). [Cephalotus 

 the only genus.] Stemlesa marsh plants 

 found in New Holland. 



Cepheus, (se'fe-us). [Classical.] One of the 

 northern constellations. 



Ceramiacese, ( ser-a-mi-a'se-e ). [Ceramium, 

 2.v.]=Rose-tangles: rose-coloured sea-weeds, 

 multiplying by tetraspores, belonging to 

 Algales. 



Ceramium, ( ser-a'mi-um ). [Gk. keramion, 

 pitcher.]:=Rose-tangle: the typical genus of 

 Ceramiaceae. 



Cerargyrite, (ser-ar'ji-rlt). [Gk. keras, horn; 

 Argentum, <7.v.]=Horn-silver: an ore of sil- 

 ver, chiefly chloride. 



Cerasin, (ser'a-sin). [Cerastis, <?.v.]=Cherry- 

 tree grim : chiefly calcic metagummate. 



Cerastium, (se-ras'ti-um). [Gk. keras, horn; 

 shape of capsule. ]=Mouse-ear chickweed: an 

 herb with white flowers, belonging to Caryo- 

 phyllaceae. 



Cerasus, (ser'a-sus). [L. cerasum, cherry. j= 

 Cherry: a plant, with edible fruit, belonging 

 to Drupaceae. 



Ceratodermia, (ser-a-to-der'mi-a). [Gk. kerns, 

 horn: derma, skin.] De Blainville's term 

 for Echinodermata. 



Ceratodus, (se-rat'o-dus). Barramunda: chiefly 

 known by fossil teeth; but found alive in 

 Queensland in 1870: a mud-fish, resembling 

 the Lepidosiren. 



Ceratophyllaceae, (ser-a-to-fil-la'se-e). [Cerato- 

 phyllum, Q.v.]=Horn-worts: water herbs, in 

 ditches, belonging to Urticales. 



Ceratophyllum, (ser-a-to-f Il'lum). [Gk. keras, 

 horn; phyllon, leaf. ]= Horn-wort: the only 

 genus of Ceratophyllacese; named from the 

 shape of the petals. 



Cercaria, (ser-ka'ri-a). [Gk. kerkos, tail.] The 

 nurse form of fluke-worms, found in stag- 

 nant pools; larva of distoraa. 



Cercocebus, (ser-ko-se-bus). [Gk. kerkos, tail; 

 cebus, q.v.] Malbrouck monkey, Green mon- 

 key, &c. ; separated from Cercopithecus. 



Cercoleptes, ( ser-ko-lep'tez ). [Gk. kerkos, 

 tail; leptos, slender.] Arboreal plantigrade 

 carnivorous animals, with long flexible tails; 

 found only in Amazonian forests. 



Cercopithecus, (ser-ko-pith-e'kus). [Gk. ker- 

 kos, tail; pithekos, ape.]=Greeu monkey: a 

 small long-tailed monkey. 



Cerebellum, (ser-e-bel'lum). [The Latin word.] 

 The hinder part of the brain, above the 

 medulla oblongata. 



Cerebral, (ser'e-bral). [Cerebrum, q.v.] Re- 

 lated to the brain. C. ganglia: nerve-cen- 

 tres in the head, or near the mouth in lower 

 animals. C. hemispheres: the upper portion 

 of the brain, which is divided into two hemi- 

 spheroidal portions. C. nerves: twelve pairs 

 of nerves proceeding from the brain, to the 

 nose, eyes, face, ears, tongue, &c. 



Cerebration, (ser-e-bra'shun). [Cerebrum, 

 q.v.] The influence of the brain upon the 

 nerves in causing action. 



Cerebric acid, (se-reb'rik). [Cerebrum, q.v.] 

 Impure protagon, q.v.; an acid substance 

 found in the brain. 



Cerebro-spinal, (ser-e-br5-spi'nal). [Cerebrutr 

 and Spinal, q.v.] Related to the brain and 

 spinal cord. C. axis: the brain and spinal 

 cord, lying in the cavities of the skull and 

 spinal column. C. centres: the brain and 

 spinal cord, from which the nerves proceed. 

 C. system: the brain and spinal cord, with 

 the cerebral and spinal nerves. 



Cerebrum, (ser'e-brum). [The Latin woi'd.]= 

 the brain: the centre of consciousness and 

 volition. 



Cerene, (se'ren). [L. cera, wax.]=Co7H5g= 

 Paraffin: a hydrocarbon, obtained from wax 

 by distillation. 



Ceres, (se'rez). [Classical.] One of the Aster- 

 oids, q.v. 



