stroboscope

noun stro·bo·scope \ ˈstrō-bə-ˌskōp \

Definition of stroboscope

:an instrument for determining the speed of cyclic motion (such as rotation or vibration) that causes the motion to appear slowed or stopped: such as
a :a revolving disk with holes around the edge through which an object is viewed
b :a device that uses a flashtube to intermittently illuminate a moving object
c :a cardboard disk with marks to be viewed under intermittent light

Origin and Etymology of stroboscope

Greek strobos whirling + International Scientific Vocabulary -scope


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