heterodromous

a. [ Hetero- + Gr. &unr_; to run. ] 1. (Bot.) Having spirals of changing direction. Gray. [ 1913 Webster ]

2. (Mech.) Moving in opposite directions; -- said of a lever, pulley, etc., in which the resistance and the actuating force are on opposite sides of the fulcrum or axis. [ 1913 Webster ]