RADIATION

, is the casting or shooting forth of rays of light as from a centre.—Every visible body is a radiating body; it being only by means of its rays that it affects the eye.—The surface of a radiating or visible body, may be conceived as consisting of radiant points.

RADICAL Sign, in Algebra, the sign or character denoting the root of a quantity; and is this √. So √2 is the square root of 2, and √32 is the cube root of <*>, &c.

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Entry taken from A Mathematical and Philosophical Dictionary, by Charles Hutton, 1796.

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* RADIATION
RADIOMETER
RADIUS
RADIX
RAFTERS
RAIN