The Collaborative International Dictionary of English v.0.48:

Twinkling \Twin"kling\, n.
   1. The act of one who, or of that which, twinkles; a quick
      movement of the eye; a wink; a twinkle. --Holland.
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   2. A shining with intermitted light; a scintillation; a
      sparkling; as, the twinkling of the stars.
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   3. The time of a wink; a moment; an instant.
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            In a moment, in the twinkling of an eye, at the last
            trump, . . . the dead shall be raised incorruptible.
                                                  --1 Cor. xv.
                                                  52.
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The Collaborative International Dictionary of English v.0.48:

Twinkle \Twin"kle\ (tw[i^][ng]"k'l), v. i. [imp. & p. p.
   Twinkled (tw[i^][ng]"k'ld); p. pr. & vb. n. Twinkling
   (tw[i^][ng]"kl[i^]ng).] [OE. twinklen, AS. twinclian; akin to
   OE. twinken to blink, wink, G. zwinken, zwinkern, and perhaps
   to E. twitch.]
   1. To open and shut the eye rapidly; to blink; to wink.
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            The owl fell a moping and twinkling.  --L' Estrange.
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   2. To shine with an intermitted or a broken, quavering light;
      to flash at intervals; to sparkle; to scintillate.
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            These stars do not twinkle when viewed through
            telescopes that have large apertures. --Sir I.
                                                  Newton.
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            The western sky twinkled with stars.  --Sir W.
                                                  Scott.
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WordNet (r) 3.0 (2006):

twinkling
    adj 1: shining intermittently with a sparkling light; "twinkling
           stars"
    n 1: a very short time (as the time it takes the eye to blink or
         the heart to beat); "if I had the chance I'd do it in a
         flash" [syn: blink of an eye, flash, heartbeat,
         instant, jiffy, split second, trice, twinkling,
         wink, New York minute]

Moby Thesaurus II by Grady Ward, 1.0:

63 Moby Thesaurus words for "twinkling":
   blink, blinking, blinky, breath, coruscant, coruscating,
   coruscation, coup, crack, firefly, flash, glimmer, glimmering,
   glimmerous, glimmery, glisten, glistening, glister, glistering,
   glitter, glittering, glittery, glowworm, half a jiffy, half a mo,
   half a second, half a shake, instant, jiff, jiffy, microsecond,
   millisecond, minute, moment, scintilla, scintillant, scintillating,
   scintillation, scintillescent, sec, second, shake, shimmer,
   shimmering, shimmery, spangle, spangly, spark, sparkle, sparkling,
   split second, stroboscopic light, stroke, tick, tinsel, tinselly,
   trice, twink, twinkle, twinkly, twitch, two shakes, wink