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  Dictionary Definition of ray

ray [1]
1. a narrow beam of light.
2. a gleam, or slight manifestation, of intelligence, comfort, etc.: a ray of hope.
3. a raylike line or stretch of something.
4. Poetic light or radiance.
5. a line of sight.
6. Physics a. any of the lines or streams in which light or radiant energy appears to issue from a luminous object. b. the straight line perpendicular to the wavefront in the propagation of radiant energy. c. a stream of material particles moving in the same line.
7. Mathematics. one of a system of straight lines emanating from a point.
8. any of a system of parts radially arranged.
9. Zoology a. one of the branches or arms of a starfish or other radiate animal. b. one of the jointed supports of the soft fins of fishes.
10. Botany a. a ray flower. b. one of the branches of an umbel. c. medullary ray. d. (in certain plants of the family Compositae) the marginal part of the flower head.
11. Astronomy one of many long bright streaks radiating from the large lunar craters.
-- verb (i)
12. to emit rays.
13. to issue in rays.
-- verb (t)
14. to send forth in rays.
15. to throw rays upon; irradiate.
16. to subject to the action of rays, as in radiotherapy.
17. to furnish with rays or radiating lines.
[ME raye from OF rai, from L radius. See RADIUS ]
Ray [1]
1. John, 1627--1705, English naturalist; provided systematic classifications and descriptions of animal and vegetable life.
2. Johnnie ( John Alvin Ray ), 1927--90, US pop singer.
3. Man, 1890--1976, US surrealist painter and photographer; turned to film-making in 1923.
4. Satyajit, 1922--92, Indian film director; major films include Jalsaghar (The Music Room, 1958), and Mahanagar (The Big City, 1963).