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The property of transmitting radiant heat; the quality of being diathermous. Melloni.

The doctrine or the phenomena of the transmission of radiant heat. Nichol.

Having the property of transmitting radiant heat; diathermal; - - opposed to athermanous.

To thrust forth; to emit; to push out. [Obs.] So from the seas exerts his radiant head The star by whom the lights of heaven are led. Dryden.

Any body that gives light, especially one of the heavenly bodies. " Radiant luminary." Skelton. Where the great luminary . . . Dispenses light from far. Milton.

to death. Phil. ii. 27. He drew not nigh unheard; the angel bright, Ere he drew nigh, his radiant visage turned. Milton.

A circle, or disk, or any indication of radiant light around the heads of divinities, saints, and sovereigns, upon medals, pictures, etc.; a halo. See Aureola, and Glory, n., 5.

The quality of being radiant; brilliancy; effulgence; vivid brightness; as, the radiance of the sun. Girt with omnipotence, with radiance crowned. Milton. What radiancy of glory, What light beyond compare ! Neale.

To emit rays; to be radiant; to shine. Virtues shine more clear In them [kings], and radiant like the sun at noon. Howell.

An instrument designed for measuring the mechanical effect of radiant energy.

tive modification or application of the thermopile, used for indicating minute changes of radiant heat, or temperature.

Direct observation of objects opaque to light by means of some other form of radiant energy, as the Röntgen rays. -- Ra`di*o*scop"ic (#), *scop"ic*al (#), a.

Telegraphy using the radiant energy of electrical (Hertzian) waves; wireless telegraphy; -- the term adopted for use by the Radiotelegraphic Convention of 1912.

Radiating; radiant. [Obs.] G. Fletcher.

A line of light or heat proceeding from a radiant or reflecting point; a single element of light or heat propagated continuously; as, a solar ray; a polarized ray.

Casting a bright light; radiant; brilliant; resplendent; shining; splendid; as, refulgent beams. -- Re*ful"gent*ly, adv. So conspicuous and refulgent a truth. Boyle.

To cook by exposure to radiant heat before a fire; as, to roast meat on a spit, or in an oven open toward the fire and having reflecting surfaces within; also, to cook in a close oven.

Hence, gloom; dark or threatening aspect. Burns. A ruddy storm, whose scowl Made heaven's radiant face look foul. Crashaw.

ects placed here and there. High on their heads, with jewels richly set, Each lady wore a radiant coronet. Dryden. Pastoral dales thin set with modern farms. Wordsworth.

Bright; glittering; radiant; fair; showy; sheeny. [R., except in poetry.] This holy maiden, that is so bright and sheen. Chaucer. Up rose each warrier bold and brave, Glistening in filed steel and armor sheen. Fairfax.