Top Definition
One microsecond equals one millionth of a second.
1 microsecond= Length of time of one commercial high-speed strobe light flash.

2.68 microseconds= the amount of time subtracted from the Earth Day as a result of the 2004 Indian Ocean earthquake. It is reported that the earthquake slightly shifted the Earth around on its axis, shortening the day by 2.68 microseconds.
by MaxxOverload July 20, 2009

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