Source : Webster's Revised Unabridged Dictionary (1913)

Scintillate \Scin"til*late\, v. i. [imp. & p. p. {Scintillated};
   p. pr. & vb. n. {Scintillating}.] [L. scintillare,
   scintillatum, from scintilla a spark. Cf. {Stencil}.]
   1. To emit sparks, or fine igneous particles.

            As the electrical globe only scintillates when
            rubbed against its cushion.           --Sir W.
                                                  Scott.

   2. To sparkle, as the fixed stars.

Source : WordNet®

scintillate
     v 1: give off; "the substance scintillated sparks and flashes"
     2: reflect brightly; "Unquarried marble sparkled on the
        hillside" [syn: {sparkle}, {coruscate}]
     3: emit or reflect light in a flickering manner; "Does a
        constellation twinkle more brightly than a single star?"
        [syn: {twinkle}, {winkle}]
     4: physics: fluoresce momentarily when struck by a charged
        particle or high-energy photon; "the phosphor fluoresced"
     5: be lively or brilliant or exhibit virtuosity; "The musical
        performance sparkled"; "A scintillating conversation";
        "his playing coruscated throught the concert hall" [syn: {sparkle},
         {coruscate}]