twinkling

1. The act of blinking.
2. A blink or twinkle: the twinkling of a starry sky.
3. The time it takes to blink once; an instant: disappeared in the twinkling of an eye.

noun

A very brief time: crack, flash, instant, minute¹, moment, second¹, trice, twinkle, wink. Informal jiff, jiffy. Chiefly British tick. See big/small/amount, time.

The noun has one meaning:

Meaning #1: a very short time (as the time it takes to blink once)
  Synonyms: blink of an eye, flash, instant, jiffy, split second, trice, wink, New York minute

The adjective twinkling has one meaning:

Meaning #1: shining intermittently with a sparkling light