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 centimetre of pure water at its maximum density. It is equal to 15.432 grains. See Grain.

<physics> Gram degree, or Gramme degree, a unit of heat, being the amount of heat necessary to raise the temperature of one gram of pure water one degree centigrade.

<physics> Gram equivalent, that quantity of the metal which will replace one gram of hydrogen.

Origin: F. Gramme, from Gr. ? that which is written, a letter, a small weight, fr. ? to write. See Graphic.

(01 Mar 1998)