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History
History
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Meaning:
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a line, beam, of radiant light, heat, energy; X-rays; a small sign; any of a number of lines coming out from a centre

beam; indication

glimmer light radiation bar blaze blink emanation flash flicker gleam glint glitter hint incandescence irradiation moonbeam patch pencil radiance scintilla shaft shine spark sparkle streak stream sunbeam trace wave
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Cases of word usage

1) a beam or ray of soft light; a brief snow of some quality or emotion (gleam)

2) to cause (a ray of light) to bend where it enters water, glass etc (refract)

RAY as in Wiktionary
RAY as in Wikipedia