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ting forth of anything from a point or surface, like the diverging rays of light; as, the radiation of heat.

A conjunction or concentration of rays in one point. Bacom

The emission and diffusion of rays of light.

Emission of radiance.

Act of irradiating, or state of being irradiated.

The measurement of the force of solar radiation. Maury.

on (first fully described by Francis Baily, 1774 -- 1844) is thought to be an effect of irradiation, and of inequalities of the moon's edge.

Radiations first observed by the French physicist Henri Becquerel, in working with uranium and its compounds. They consist of a mixture of alpha, beta, and gamma rays.

An outside covering, for protection or ornament, or to precent the radiation of heat.

A jacket or outer covering of wood, etc., to prevent radiation of heat, as from the boiler, cylinder. etc., of a steam engine.

ering of non-conducting material on the outside of a boiler, or steam chamber, to prevent radiation of heat. Knight.

ing out with a sudden force and rapid flight. [Archaic or Technical] "An ejaculation or irradiation of the eye." Bacon.

That which irradiates or is irradiated; luster; splendor; irradiation; brilliancy. Milton.

ing, esp. a covering of some nonconducting material such as wood or felt, used to prevent radiation of heat, as from a steam boiler, cylinder, pipe, etc.

lothing (esp., an outer, wooden covering), as of a steam cylinder, applied to prevent the radiation of heat; a covering of lags; -- called also deading and cleading.

a portion of a wall of a vacuum tube, or which is mounted within the tube and exposed to radiation from the cathode. Lenard rays are similar in all their known properties to cathode rays. So called from the German physicist Philipp Lenard (b. 1862), who first described them.

alism; -- opposed to occidental; as, Oriental countries. The sun's ascendant and oriental radiations. Sir T. Browne.

h has such marginal flowers. Radiant energy (Physics), energy given out or transmitted by radiation, as in the case of light and radiant heat. -- Radiant heat, proceeding in right lines, or directly from the heated body, after the manner of light, in distinction from heat conducted or carried by intervening media. --…

In a radiate manner; with radiation or divergence from a center.

Capable of radiating; acting by radiation. Tyndall.