noun In optics, a luminous point or object from which light radiates to the eye, or to a mirror or lens a point considered as the focus of a pencil of rays.Giving off rays, which do not form a broken or indented edge to the bearing, but stream from it, its outline being usually perfect and the rays apparently streaming from behind it.Edged with rays: said of an ordinary or other bearing such as is usually bounded with straight lines, the rays generally appearing like long indentations.Giving out rays proceeding in the form of rays resembling rays radiating also, radiated radiate: as, radiant heat.Darting, shooting, or emitting rays of light or heat shining sparkling: beaming with brightness, literally or figuratively: as, the radiant sun a radiant countenance.noun A substance that emits rays, specifically N-rays.noun In geometry, a ray conceived as revolving about its starting-point.noun Astronomy The apparent celestial origin of a meteoric shower.noun An object or point from which light or heat rays are emitted. adjective Showing or expressing vitality or joy.adjective Filled with light shining especially as rays brightly shining: synonym: bright.adjective Consisting of or emitted as radiation.From The American Heritage® Dictionary of the English Language, 5th Edition.
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