A very brief period of time; moment; instant
A particular or precise time:
Instantaneous illumination for photography:
One thousandth (10−3 ) of a second.
One billionth (10&spminus;9 ) of a second.
The action of a thing that twinkles
(Physics) The time taken for light to travel one centimetre in a vacuum (sometimes one foot, or sometimes the width of a nucleon)
A very short period of time; an instant:
The very brief time required for a wink; an instant.
One millionth of a second
Find another word for split-second. In this page you can discover 33 synonyms, antonyms, idiomatic expressions, and related words for split-second, like: blink-of-an-eye, fraction of a second, heartbeat, instant, nothing-flat, bat of an eye, flash, half a second, millisecond, moment and nanosecond.