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| 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.