GLOSSARY. 



41 



Crop. In geology, the edge of an in- 

 clined stratum when it comes to 

 the surface. 



Cru'cial (Lat. crux, a cross). Trans- 

 verse ; like a cross ; in experimental 

 science, searching, decisive. 



Cru'cible (Lat. cru'rio, I torment). A 

 vessel of clay, sand, and ground 

 ware, or other material capable of 

 enduring heat : used in chemistry 

 and manufactures. 



Cruciferous (Lat. crux, a cross ;fero, 

 I bear). Bearing a cross : applied 

 to an order of plants, the four petals 

 of the flowers of which are arranged 

 in the form of a cross. 



Cru'cifbrm (Lat. crux, a cross \.forma, 

 shape). Shaped or arranged like a 

 cross. 



Crudity (Lat. crudus, raw). Rawness; 

 undigested substance. 



Crura (Lat. crus, a leg). Legs ; in 

 anatomy, applied fancifully to pro- 

 jections of some parts of the body. 



Crural (Lab. crus, a leg). Of or be- 

 longing to the legs. 



Crusta petrosa (Lat. a strong crust). 

 A bony layer which covers the fangs 

 of the teeth. 



Crusta'ceous (Lat. crusta, a crust or 

 shell). Having a crust : applied to 

 a class of invertebrate animals, of 

 which the lobster is an example, 

 which have hard jointed shells. 



Cryoph/orus (Gr. Kpvos, kruos, ice ; 

 (pepa, phero, I bear). An instru- 

 ment for freezing water by its own 

 evaporation. 



Crypt (Gr. Kpinrra), krupto, I hide). A 

 hidden recess ; in anatomy, applied 

 to some of the minute cavities or 

 simple glands of mucous membranes. 



Cryptobranch'iate (Gr. Kpvirru, krupto, 

 I hide ; fipayxia, branchia, gills). 

 Not having conspicuous gills ; ap- 

 plied to certain articulated and 

 molluscous animals. 



Cryptogam'ia (Lat. KpvTrra, krupto, I 

 hide ; ya^os, gamos, marriage). 

 An order of plants in which the 

 distinction of sexes is not obvious. 



Crystal (Gr. KpvaraXXos, krustal'los, 

 ice). A geometrical figure, assumed 

 by most substances under favour- 

 able circumstances ; also a general 



name for some transparent mineral 

 substances. 



Crys'talline (Gr. Kpv<rTa\\os, krus- 

 tal'los, ice or crystal). Consisting 

 of or resembling crystal : applied to 

 a lens of the eye. 



Crystallisation (Gr. /cpvoTaAAos, krus- 

 tal'los, ice or crystal). The as- 

 suming of crystalline or geometrical 

 forms by substances. 



Crystallography (Gr. Kpva-Ta\\os, 

 krustal'los, ice or crystal ; ypaqxa, 

 grapho, I write). The science which 

 describes crystals. 



Cten'oid (Gr. KTCIS, kteis, a comb ; 

 et'Sos, eidos, form). An order of 

 fishes having scales jagged like the 

 teeth of a comb. 



Cteaoptycb/ius (Gr. KT<-IS, kteis, a 

 comb ; irruxrj, ptuchc, a wrinkle). 

 A genus of fossil teeth distinguished 

 by the serrated margin of their 

 cutting edges. 



Cube (Gr. /cujSoj, kubos, a solid square). 

 In geometry, a solid body having 

 six equal sides with equal angles ; 

 in arithmetic, the product of a 

 number multiplied twice into itself. 



Cubic (Gr. KV&OS, kubos, a cube). 

 Having the property of, or capable 

 of being contained in, a cube. 



Cu'bital (Lat. cubitus, the elbow). Of 

 or belonging to the elbow. 



Cuboid (Gr. KV&OS, kubos, a cube ; 

 eiSos, eidos, shape). Like a cube 

 or die. 



CucuTlate (Lat cucul'lus, a hood). 

 Like a hood. 



Cul-de-sac (French). A passage closed 

 at one end. 



CuTminate (Lat. culmen, a top). To 

 become vertical, or gain the extreme 

 point of height. 



Cultriros'tres (Lat. culter, a plough- 

 share ; rostrum,, a beak). A family 

 of grallse or stilt-birds, having a 

 long, thick, stout beak, including 

 cranes, herons, and storks. 



Cum'brian (Cumbria, Wales). A name 

 given to the strata which lie be- 

 neath the true Silurian system, 

 from their occurring largely in 

 Wales and Cumberland. 



Cu'neate (Lat. cu'neus, a wedge). Like 

 a wedge. 



