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
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