CORRODENTIA 



COW 



Culum, a little body.] 1. Minute circular 

 discs, of a yellow-red colour, which give to 

 blood its red colour. 2. Similar particles of 

 a white colourless regular form. 



Corrodentia, (kor-ro-den'shi-a). [L. corrodo, 

 I gnaw; dens, tooth. ]=Termitinae: insects of 

 which the white ants are the type; a division 

 of Orthoptera. 



Corrosive sublimate, (kor-ro'siv). [L. corrodo, 

 I gnaw away.]=Hgd2=Bichloride of mer- 

 cury: a white, crystalline, poisonous sub- 

 stance. 



Corundum, (ko-run'dum). [The Indian name.] 

 =Adamantine spar: a mineral, crystallising 

 in hexagons, composed chiefly of alumina. 

 The ruby and sapphire are varieties of cor- 

 undum. 



Corvette, (kor-vef). [The French name.] A 

 small ship of war. 



Corvidae, (kor'vi-de). [Corvus, q.v.] Crows: 

 a family of birds, belonging to Conirostres, 

 including the crow, magpie, raven, rook, <fcc. 



Corvus, (kor'vus). [The Latin name.] 1.= 

 The crow: a small southern constellation. 2. 

 A large carnivorous bird, the type of Cor- 

 vidae. C. corone: Carrion crow. C. coraa:= 

 Raven. 



Corylaceae, (ko-ri-la'se-e). [Corylus, q.v.]=z 

 Mast-worts: trees and shrubs, including the 

 beech, chestnut, hazel, oak, <fec., belonging 

 to Quernales: have the flowers in catkins, 

 and nuts inclosed in cups. 



Corylus, (kor'i-lus). [The Latin name.] = 

 Hazel: a shrub or tree, the type of Cory Li- 

 cero: fossil remains of C. are found in Lower 

 Miocene strata. 



Corymb, (kor'im). [Gk. korymbus, a bunch.] 

 An inflorescence in small heads, level at the 

 top. 



Corynidae, (kor-in'i-dS). [Gk. Icoryne, a little 

 club.] A sub-division of Hydrozoa, mostly 

 marine. 



Coryphaena, (ko-ri-fe'na). 

 to Acanthopterygii. 



Cosecant, ( co-se'kant ). 

 secant, q.v.] In a right- 

 angled triangle the co- 

 secant of an angle is the 

 ratio of the hypothenuse 

 to the side opposite the 

 angle. 



Coseismal, (ko-sls'mal). 



[Gk. fifiiswios, earthquake.] ~ 



The line in which a wave 



shell reaches the earth at Cosecant 



the same time, v. Seismology. 



Cosine, (ko'sin). [Complement of sine, q.v.] 

 In a right-angled triangle 

 the cosine of any one of the 

 angles is the ratio of the 

 side joining it to the right 

 angle to the hypothenuse. 



Costal, (kos'tal). [L. costa, 

 rib.] Belonging to the ribs. 

 C. plates: developed ribs, in Cosine. 

 Chelonia. 



Cotangent, (ko-tan'jent). [Complement of 

 tangent, q.v.] In any right-angled triangle 

 the cotangent of any one of the angles is the 



A fish, belonging 

 [ Complement of 



\ 



ratio of the side joining tha angle to the 



right angle to the side op- 

 posite the angle. 

 Cotton, (kot'n). [Colon, the 



French name.] A vegetable 



fibre, in very short pieces, 



growing from the seeds of 

 Gossypium, which are spun 



into long threads. C. grass 



=Eriophorum. C. plant= 



Gossypium herbaceum, and 



other species. 



pentandrum. 



Cocangent. 



C. tree of India = Bombax 

 C. wool acts as a filter to air, 

 separating the solid particles. C. trees = 

 Bombacese, q.v. 



Cottus, (kot'tus). [The Latin name.] A fish 

 belonging to Acanthopterygii. 



Coturnix, (ko-ter'niks). A bird of the grousa 

 kind, belonging to Tetraoimlre. 



Cotyledon, (ko-ti-le'don). [Gk. kotyledon, a 

 cup or small cavity.] l.=Penny-wort: a plant 

 belonging to Crassulacese, named from its 

 cup-shaped leaves. 2.= A. seed-leaf, which 

 contains nutriment for the plant in its e;rly 

 stage of growth. 8.=The cup-shaped tul'ts 

 of the placenta in Runiinantia. 



Cotyledonary placenta. In which the foetal 

 villi are gathered into bunches or cotyledons, 

 as in ruminant animals. 



Cougar, (koo'gar). [Corruption of Brazilian 

 name.] = Cougouai 1 

 = Puma = Ameri- 

 can lion=Felis con- 

 color. 'A carnivor* 

 ous animal, found 

 in South and Cen- 

 tral America. 



Coumaric acid, (koo'- 

 ma-rik). [Couma- 

 rin, q.v.] C 9 H 8 O 3 : 

 obtained from cou- 

 marin. Cougar. 



Coumarin, (koo'ma-rin)=C9H c Oo: a crystalline 

 substance found in the Tonka bean or Cou- 

 maroma odorata. I 



Counter trade winds, Further N. and S. than 

 the trade winds, q> v., and blowing the re- 

 verse 1 way. | 



Countesses, (kount'es-ez). Slates for roofing, 

 20 inches by 10 inches. 



Couple, (cup'l). [L. copula, bond.] 1. Two 

 equal forces acting in opposite directions at 

 two different points of a body, tending to 

 produce rotation. 2. Optical C.: a double 1 

 star, in which the two stars have no mutual 

 relation. 3. Physical C.: a double star, in 

 which the two stars are related to each other 

 in some way. 4. Galvanic C.: two sub- 

 stances so arranged as to form a galvanic cell, 

 and produce a current. 5. Thermo-electric 

 C. ; two metals of different conducting 

 powers for heat. 



Couxio=Pithecia Satanas: an American mon- 

 key with black beard. 



Coversed sine. The coversed sine of any angle 

 is the difference between its sine and unity: 

 covers A=:l sin. A. 



Cow, (kow). [Cu, the A.-S. name.] The fe- 

 male of the ox. C. &irc?=Coccygus Ameri- 



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