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 bodily equilibrium.
The difference in magnitude between opposing forces or influences, such as for bodily parts or organs.
Equality of mass and net electric charge of reacting species on each side of a chemical equation.