What is Gramme?

Legal Definition
A French weight. The gramme is the weight of a cubic centimetre of distilled water, at the temperature of zero. It is equal to 15.4441 grains troy, or 5.6481 drachms avoirdupois. Vide. Measure.
-- Bouviers Law Dictionary
Legal Definition
The unit of weight in the metric system. The gramme is the weight of a cubic centimeter of distilled water at the temperature of 4° C. It is equal to 15.4341 grains troy or 5.6481 drachms avoirdupois.
-- Black's Law Dictionary