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  • noun

Words related to countdown

counting backward from an arbitrary number to indicate the time remaining before some event (such as launching a space vehicle)

References in periodicals archive ?
What are the count-down starting lights called in drag racing?
What are the count-down starting lights festival on Shrove Tuesdays?
Now the count-down is on for 2012 when the only national show dedicated to grow-your-own returns to Stoneleigh Park in Warwickshire.
A last-minute delay prompted a hold with 30-seconds left on the count-down clock as NASA verified the position of a gaseous vent arm to ensure it was out of the way for launch.
Both feature a 30-day count-down timer with alarm and auto-off, data logger, and RS-232 I/O port for data logging or controlling the units from a computer.