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Definition of Gram (measure)

Gram (measure): A unit of measurement of weight and mass in the metric system. In weight, a gram is equal to a thousandth of a kilogram. In mass, a gram is equal to a thousandth of a liter (one cubic centimeter) of water at 4 degrees centigrade.

The word "gram" comes from the Late Latin "gramma" meaning a small weight via the French "gramme."

The abbreviation for gram is gm. Its symbol is g.

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