Gram, Gramme (?), n. [F. gramme, from Gr.? that which is written, a letter, a small weight, fr.? to write. See Graphic.] The unit of weight in the metric system. It was intended to be exactly, and is very nearly, equivalent to the weight in a vacuum of one cubic centimeter of pure water at its maximum density. It is equal to 15.432 grains. See Grain, n., 4.
Gram degree, orGramme degree(Physics), a unit of heat, being the amount of heat necessary to raise the temperature of one gram of pure water one degree centigrade. — Gram equivalent(Electrolysis), that quantity of the metal which will replace one gram of hydrogen.