_Camp_ CROWN, _corona castrensis_, the reward of those who first passed the palisades of, and forced an enemy’s camp. _Mural_ CROWN, _corona muralis_, the recompense and mark of honor due to those who first mounted the breach at an assault of a besieged town. _Civic_ CROWN, _corona civica_, more esteemed than the preceding: it was the distinguishing mark of those who had saved the life of a Roman citizen in battle. It was given to Cicero for dissipating the conspiracy of Catiline, and denied to Cæsar, because he embrued his hands in the blood of his fellow citizens. _Triumphal_ CROWN, _corona triumphalis_, the symbol of victory, and presented to a general who gained any signal advantage to the republic. _Grass_ CROWN, _corona graminea_ was delivered by the whole Roman people to any general who had relieved an army invested or besieged by the enemy. The other _crowns_ were distributed by the emperors and generals; this was given to Fabius by the Roman people, for obliging Hannibal to decamp from Rome. _Olive_ CROWN, _corona oliva_, the symbol of peace, and presented to the negotiators of it. CROISADE CRUSADE in military history, also called a holy war, barbarous expeditions of the Christians against the Saracens or Turks for the recovery of the holy land, and so called from those who engaged in it wearing a cross on their clothes. CUBE a solid, consisting of 6 equal square sides. The solidity of any cube is found by multiplying the superficial content of any one of the sides by the height. Cubes are to one another in the triplicate ratio of their diagonals. CUBE-_root_, is the side of one of the squares constituting the cube. CUBIC _foot_, implies so much as is contained in a cube whose side is 1 foot, or 12 inches. CUBIC _hyperbola_, is a figure expressed by the equation _x y²_ = _a_, having 2 asymptotes, and consisting of 2 hyperbolas, lying in the adjoining angles of the asymptotes, and not in the opposite angles, like the Apollonian hyperbola, being otherwise called, by Sir Isaac Newton, in his _enumeratio linearum tertii ordinis_, an hyperbolismus of a parabola: and is the 65th species of lines, according to him. CUBIC _number_, is that which is produced by multiplying any number by itself, and then again the product by that number. CUBIC _parabola_, a curve of the second order, having infinite legs, diverging contrary ways. CUE _or_ QUEUE, the hair tied in form of a tail. All the British soldiers, excepting the grenadiers and light infantry, till very lately wore their hair cue’d. CUIRASSE, a piece of defensive armor, made of plate, well hammered, serving to cover the body, from the neck to the girdle, both before and behind, called breast and back plate.