Webster's English Dictionary

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scintillate

scin.til.late \'sint-*l-.a-t\ \-.a-t-*r\ vb [L scintillatus, pp. of 
   scintillare to sparkle, fr. scintilla] spark 1: to emit sparks : SPARK  2: 
   to emit quick flashes as if throwing off sparks; also : SPAR KLE, TWINKLE : 
   to throw off as a spark or as sparkling flashes {~ witticisms> - 
   scin.til.la.tor n