split second

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a very short time (as the time it takes the eye to blink or the heart to beat) (Freq. 1)
- if I had the chance I'd do it in a flash
• Syn:
blink of an eye, flash, heartbeat, instant, jiffy,
trice, twinkling, wink, New York minute
• Derivationally related forms:
flash (for: flash)
• Hypernyms:
moment, mo, minute, second, bit