имя существительное 1) бегущая дорожка 2) однообразный механический труд
(колесо-)топчак (большое ступальное колесо)
noun 1. a. a mill worked by persons treading on steps on the periphery of a wide wheel having a horizontal axis and used formerly in prison punishment b. a mill worked by an animal treading an endless belt c. a device having an endless belt on which an individual walks or runs in place for exercise or physiological testing 2. a wearisome or monotonous routine resembling continued activity on a treadmill Example: the office treadmill