stopwatch /ˈstɑːpˌwɑːtʃ/ noun plural stopwatches
plural stopwatches
Learner's definition of STOPWATCH
[count]
: a watch that can be started and stopped very quickly and that is used for measuring the amount of time that is taken to do something (such as to run a race)(赛跑等用的)秒表,跑表