noun
: a fractional part of a second : any almost imperceptible period of time : flash , instant
happened in a split second
one split second of surprise — Margery Sharp
noun
: a fractional part of a second : any almost imperceptible period of time : flash , instant
happened in a split second
one split second of surprise — Margery Sharp
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012