A device that measures elapsed time, i.e., a stopwatch. The word can be used to denote the device itself or a watch that incorporates the device. Most modern chronograph watches are equipped with a center-mounted seconds hand for showing the elapsed seconds and a subdial or subdials to show the elapsed minutes and, on some watches, the elapsed hours. A standard chronograph has two pushers on the side of the case. The top one is used to start and stop the chronograph function and the bottom one to return the elapsed seconds, minutes, and, when present, hours hand to zero.
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