what is gm
gram (g or gm) The gram (abbreviation, g or gm) is the cgs (centimeter/gram/second) unit of mass. A force of one dyne (1 dyn), applied to a mass of one gram (1 g), will cause that mass to accelerate at one centimeter per second squared (1 cm/s2). Mass is often specified in larger or smaller units than the gram, by changing the power-of-10 prefix multiplier.