Enter a clue or pattern or both:
The ClueFraction of a tick: Abbr. (4 letter answer)
NotesThe answer MSEC is rarely seen, appearing only about once every 1200 puzzles.
Related CluesFraction of a min.
One 60-thousandth of a min.
Brief moment, briefly
Approx. camera flash duration
Brief moment in time: Abbr.
Not much time: Abbr.
Processing time unit: Abbr.
Very short time, for short
DefinitionMSEC as a noun:
1. (millisecond, msec) = one thousandth (10^-3) of a second