资料来源 : Webster's Revised Unabridged Dictionary (1913)

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.