Pronunciation: (sin"tl-ā'shun), [key]
1. the act of scintillating; sparkling.
2. a spark or flash.
3. Astron.the twinkling or tremulous effect of the light of the stars.
4. Meteorol.any small-scale twinkling or shimmering of objects that are viewed through the atmosphere, caused by an interception of the observer's line of view by inhomogeneities in the atmospheric refractive index.
a. a flash of light from the ionization of a phosphor struck by an energetic photon or particle.
b. random fluctuation of the amplitude, phase, or polarization of an electromagnetic wave.
6. (on a radar display) a slight, rapid shifting of a spot of light or the image of an object about its mean position.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.