sweep-second hand

noun
sweep-sec·​ond hand | \ ˈswēp-ˌse-kənd- How to pronounce sweep-second hand (audio) , -kənt-\

Definition of sweep-second hand

: a hand marking seconds on a timepiece mounted concentrically with the other hands and read from the same dial as the minute hand

First Known Use of sweep-second hand

1937, in the meaning defined above

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