stro·bo·scope (strō'bə-skōp') n. Any of various instruments used to observe moving objects by making them appear stationary, especially with pulsed illumination or mechanical devices that intermittently interrupt observation.
[Greek strobos, a whirling; see streb(h)- in Indo-European roots + -scope.] stro'bo·scop'ic (-skŏp'ĭk) adj., stro'bo·scop'i·cal·ly adv.