Gram \Gram\, Gramme \Gramme\ (gr[a^]m), n. [F. gramme, from Gr. gra`mma that which is written, a letter, a small weight, fr. gra`fein to write. See Graphic.] The unit of mass or 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. [1913 Webster]

Gram degree, or Gramme 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. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Gram \Gram\, Gramme \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, or Gramme 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.

Source: Webster's Revised Unabridged Dictionary (1913)