noun
: a pulley in the form of a truncated cone : a series of pulleys forming a stepped cone or conoid that are used in pairs (as for varying the velocity ratios of shafts)
noun
: a pulley in the form of a truncated cone : a series of pulleys forming a stepped cone or conoid that are used in pairs (as for varying the velocity ratios of shafts)
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012