The term 'blink of an eye' is used to describe something that happens very quickly. The crossword solutions for this term include SEC (3 letters), TRICE (5 letters), FLASH (5 letters), WINK (4 letters), JIFFY (5 letters), INSTANT (7 letters), JIFF (4 letters), NSTNT (5 letters), and SPLITSECOND (11 letters). These words all refer to a very short period of time, with SEC referring to a second, TRICE referring to three times, FLASH referring to a brief burst of light, WINK referring to a quick closing and opening of the eyes, JIFFY referring to a very short period of time, INSTANT referring to something that happens immediately, JIFF referring to a very short period of time, NSTNT referring to an INSTANT, and SPLITSECOND referring to an extremely short period of time.