CRURAL 



CTTCURBITACE.E: 



the base of the brain, between the third and 



fourth nerves. 

 Crural nerve, ( krii'ral ). [ L. crus, a leg. ] 



Branching from the spinal cord iu the lum- 



bar region, and going to the thigh. 

 Crustaceae, ( krus-tu'-se-e ). [L. crusta. J= 



Crabs, lobsters, &c.; 



a division of Ar- 



thropoda; animals 



of very varied or- 



ganization; mostly 



marine, some fresh- 



water; the aquatic 



representatives of 



Articulata : cast 



their shells periodi- 



cally; have segmen- 



ted bodies, with ar- 



ticulate appendages 

 branchiae for breath i 



Crustacea?. 



to each segment, and 

 th in gin water; named from 

 having an exoskeletou or crust. 



Crutch=Escapement, 3.1;. 



Crux Australia, (kruks aw-stralis). [L. crux, 

 cross; australis, southern.]=The Southern 

 Cross: a small but brilliant constellation in 

 the southern heavens, near the pole. 



Cryolite, (kri'o-lift). [Gk. Icryos, ice; lithos, 

 stone.]=Kryolite: a mineral of the fluorite 

 group. 



Cryophorus, (kri-of'o-rus.] [Gk. kryos, ice; 

 phoreo, I bear.] An apparatus for freezing 

 water. 



Cryptodon, (krip'to-don). [Gk. kryptos, hid- 

 den; odous, tooth.] An animal belonging 

 to Anomodontia, q.v.; known only by fossil 

 remai ns. 



Cryptogam, (krip-tog'a-me). [Gk. kryptos, 

 hidden; gamos, union. ]=A.cotyledons=Thal- 

 logens, Acrogens, and Rhizogens = Fungi, 

 lichens, ferns, mosses, &c. : plants in which 

 there are no stamens or pistils. 



Cryptogamic, (krip-to-gam'ik). [Gk. kryptos, 

 hidden; gamos, union.] Having no visible 

 means of fructification, such as stamens or 

 pistils. 



Crystal, (kris'tal). [Gk. krystallos, ice.] 1. 

 A natural solid substance, bounded by sym- 

 metrical plane faces. 2. A common namo 

 for glass. 



Crystallin, (kris-tallin.) [Gk. krystallos, ice.] 

 =Globulin, q.v. 



Crystalline, (kris-tallin). [Crystal, 3.1;.] Hav- 

 ing the nature of a crystal. 



Crystalline - schists = Gneiss, fine slate, &c. : 

 crystalline rocks, devoid of fossils, but strati- 

 fied. 



Crystalline lens. A fibrous, elastic, doubly- 

 convex lens in the eye, separating the aque- 

 ous humour of the cornea from the vitreous 

 humour of the sclerotic. 



Crystallization, (kris-tal-i-za'shun). [Crystal, 

 q.v.] Slow passage from the liquid to the 

 solid condition when the result is solidifica- 

 tion in regular geometrical forms. Analogy 

 of chemical composition is usually accom- 

 panied by identity of crystalline form. Cub- 

 ical C.; with three equal axis, all at right 

 angles. Pyramidal C.. with three axes all at 

 right angles, but the principal axis longer or 



shorter than the other two. HJiombic C. : with 

 three axes at right angles, but no two of 

 equal length. Oblique C.: with two axes at 

 right angles, and the third inclined more or 

 less than 90. Anorthic C.: with three axes, 

 none at right angles. Hexagonal C. : with the 

 principal axis at right angles with all tho 

 other three axes, which are arranged sym- 

 metrically in one plane. 



Crystallography, (kris-tal-log'ra-fi). [Crystal, 

 q.v.; Gk. grapho, I write.] The science of 

 the formation of crystals. 



Crystalloids, (kris'tal-oidz). [Crystal, q.v.: 

 Gk. eidos, form.] Substances resembling 

 crystals, cf. Colloids. 



Crystal- worts, (kris'tal-wurtz)=Bicciacer3,9.w. 



Ctenoid scales, (teu'oid). [Gk. kteis, comb; 

 eidos, form.] Scales fringed with spines. 



Ctenophora, (ten-ofo-ra). [Gk. kteis, ccronb; 

 phoreo, to bear.] Gelatinous oceanic / itin- 

 ozoa, swimming by means of ctenophores, 01 

 comb -like cilia; a sub -division of Ccelen- 

 terata. 



Ctenophoridse, ( ten-o-forl-de ). [Gk. kteis, 

 comb; phoreo, I bear.] A sub-division of 

 Actinozoa: oceanic animals swimming by tho 

 use of comb-like bands of cilia, called cteno- 

 phores. 



Ctenostomata, (ten-os-tom'a-ta). [Gk. kteis, 

 comb; stoma, mouth.] A division of marine 

 polyzoa; animals having a fringe of hairs 

 round the orifice of the cell. 



Cube, (kub). [Vubus, the Latin word.]=A 

 regular hexahedron: a 

 solid figure bounded by 

 six equal squares. (7. 

 root: the number which, 

 multiplied twice by it- 

 self, gives a certain 

 number, is the cube 

 root of that number. 



Cubic system, (ku'bik). 

 [Cube, q.v.] With axes 

 rectangular, v. Crys- 

 tallization. 



Cuckoo, (koo-kdoO. [Imitation of its cry.]r 

 Cuculus canorus: a 

 bird belonging to 

 Scansores; some are' 

 parasitic in nests 

 of other birds. (7. 

 /Zzes=Ichneumon= 



^achinae. C. spits'' 

 = Frog - hoppers : 

 larvpe of Cercopidae. 

 C. pints=Ai\un, q.v. 



Cuculidae, (koo-koo'li-de). [Cuckoo, q.v.]=s 

 Cuckoos: birds belonging to Scansores. 



Cuculinse, (koo-koo-li'ne). [Cuckoo, g.i>.]= 

 Cuckoo-bees. A family of wasp-like bees, 

 parasitic in the burrows of other bees. 



Cucumber, (ku'kum-ber). [Cucumis, the Latin. 

 name.]=Cucumis sativus: a plant belonging 

 to Cucurbitaceae, the fruit of which is edible. 



Cucumber trees, v. Magnolia. 



Cucurbita, (ku-ker'bit-a). [The Latin 

 name.]=Gourd: a plant belonging to Cu- 

 curbitacese, having an edible fruit. 



Cucurbitacese, (ku-ker-bit-a'se-e). [Cucurbita, 



Cnba 



Cuckoo. 



