Webster’s Revised Unabridged Dictionary · 1913
Heterodromous
Het′er·od′ro·mous (·ŏd′rō·mŭs), a. [Hetero- + Gr. δραμεῖν to run.] 1. (Bot.) Having spirals of changing direction. Gray.
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.