scintillate, scintillated 1. To send forth sparks or little flashes of light; to sparkle, twinkle. 2. To twinkle rapidly as of stars. Such star twinkling is caused by constant small changes in the atmosphere's density. 3. A reference to a phosphor: to fluoresce momentarily when struck by a charged particle or high-energy photon. 4. To emit as a sp... Found on http://www.wordinfo.info/words/index/info/view_unit/1909/