gram (n.) Look up gram at Dictionary.com
metric unit of weight," 1797, from French gramme (18c.), from Late Latin gramma "small weight," from Greek gramma "small weight," originally "letter of the alphabet," from stem of graphein "to draw, write" (see -graphy). Adopted into English about two years before it was established in France as a unit in the metric system by law of 19 frimaire, year VIII (1799).