balance
/băl′əns/
noun
+A weighing device, especially one consisting of a rigid beam horizontally suspended by a low-friction support at its center, with identical weighing pans hung at either end, one of which holds an unknown weight while the effective weight in the other is increased by known amounts until the beam is level and motionless.
+A state of equilibrium or parity characterized by cancellation of all forces by equal opposing forces.
+The power or means to decide.