tro·chan·tin noun alsotro·chan·tine\trōˈkantə̇n\ (-s) Etymology: French trochantin, diminutive of trochanter, from Greek trochantēr 1.: the proximal of the two segments into which the trochanter of the leg of an insect may be divided and which is often united with the coxa 2.: the lesser trochanter of the femur • tro·chan·ti·nal\-tənəl\adjective • tro·chan·tin·i·an\|trōkən.|tinēən\adjective