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Definition of gm (gram)

gm (gram): The abbreviation gm stands for gram, 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 symbol for gram is g.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=12096
Last Editorial Review: 10/9/2012

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