COR 



COR 



and that the planets moved round him in 

 elliptical orbits proportioned to their size. 

 Tliis system was established by the new 

 arguments and discoveries of Galileo, 

 Kepler, and Newton. The great prin- 

 ciple on which it rests is gravity, or that 

 force in nature by which all the planets 

 are attracted to the centre of their re- 

 spective orbits. 



COPPER {Cuprum, quasi cps Cyprium ; 

 from the island Cyprus, where it was 

 first wrought). A red metal found in 

 the common ore called copper pyrites. 

 Among its compounds are red copper, or 

 the protoxide ; black copper, or the per- 

 oxide; copper glance, or the protosul- 

 phuret ; resin of copper, the protochloride 

 or white muriate ; and the white copper 

 of the Chinese, an alloy of copper, zinc, 

 nickel, and iron. 



CO'PPERAS. Sulphate of iron, or 

 green vitriol. See Vitriol. 



COPPERNICKEL. A native arseni- 

 uret of nickel, a copper-coloured mineral 

 of Westphalia. 



CO'PROLITE (KoTTpof, dung, Xt'^of, a 

 stone). The petrified faecal matter of 

 carnivorous reptiles, resembling an ob- 

 long pebble or a kidney potato, and found 

 at Lyme Regis in Dorsetshire. 



CO'PULA. In Logic, that part of a 

 proposition which aflSrms or denies the 

 predicate of the subject; viz., is, or ia 

 not, expressed or implied. 



COR CA'ROLI. A modern northern 

 constellation, consisting of three stars. 



COR HYDR^. A star of the first 

 magnitude in the southern constellation 

 Hydra. 



COR LEO'NIS. Another name for 

 Regulus, a star of the first magnitude in 

 the constellation Leo. 



COR SCORPIO'NIS. Another name 

 for Antares, a star of the first magnitude 

 in the zodiacal constellation Scorpio, 



CORACI'IN^ {coracias, the roller). 

 Coraciine Birds, or Rollers ; a family of 

 the Excurtrices of Macgillivray, the In- 

 sessores of other writers, indigenous in 

 ■warm climates, and for the most part 

 gaudily coloured. 



CORAL RAG. A subdivision of the 

 middle Oolitic formation, named from 

 its containing abundant remains of corals 

 of various kipds. 



CORAL RED. The calcareous in- 

 ternal skeleton of a polypipherous ani- 

 mal, consisting of carbonate of lime, 

 coloured with oxide of iron, and ani- 

 mal matter. 



CORALLI'DiE {corallum, coral). Co- 

 rn 91 



rallicolcB. A family of compound polyps, 

 yielding the substance called coral, and 

 constituting the third order of the class 

 Polypi. 



CO'RALLINE DEPOSITS. In Geo- 

 logy, a designation of those recent or 

 alluvial strata, which consist of the 

 marine banks, shoals, and islands, en- 

 tirely composed of corals. 



CO'RCULUM (dim. of cor, the heart). 

 The embryo, or vital principle of a seed, 

 so named from its frequent resemblance, 

 in form, to a little heart. It consists of 

 two parts, the rostellum, or radicle, which 

 elongates downward to form a root ; and 

 the plumula, or feather, which lengthens 

 upward to form a stem and leaves. 



CO'RDATE (cordatus, from cor, a 

 heart). Heart-shaped ; having two 

 rounded lobes at the base, as applied to 

 certain leaves. 



CORIA'CEOUS {corium, hide). That 

 which has the texture of rough skin, as 

 the leaves of prunus laurocerasus. 



CO'RMUS. The dilated base of the 

 stem of monocotyledonous plants, inter- 

 vening between the roots and the first 

 buds, and forming the reproductive por- 

 tion of the stem in acaulescent plants. 

 It occurs in colchicum, in crocus, &c. 



CO'RNEOUS (corwM, a horn). Horny; 

 resembling the colour or substance of 

 horn, as the epidermis of some, and the 

 operculum of other, spiral shells ; the 

 albumen of many plants, &c. 



CO'RNEULE. A diminitive of corwm; 

 a term applied to the minute transpa- 

 rent segments which defend the com- 

 pound eyes of insects. 



CORNI'CULATE {corniculum, a little 

 horn). Horned ; terminating in a horn- 

 like process, as the fruit of trapa bi- 

 cornis. 



CORNU AMMO'NIS. An old Latin 

 name for the fossil shell, commonly called 

 ammonite, from its fancied resemblance 

 to the horn with which the head of Ju- 

 piter Ammon was sculptured. See Am- 

 monite. 



CORNU'BIANITE. A slaty rock 

 abundant in the western part of Corn- 

 wall, in contact with granite. It is of a 

 dark blue or purple colour, uniform, 

 striped or patched, hard and laminated. 



CORO'LLA (dim. of corona, a crown). 

 Literally, a little crown. The internal 

 envelope of the floral apparatus. Its 

 separate pieces are called petals; when 

 these are distinct from each other, the 

 corolla is termed poly-petalous : when 

 they cohere, gamo-petalous, or incorrectly 



