KILOGRAM

noun Etymology: French ~me, from kilo- + gramme gram Date: 1797 the base unit of mass in the International System of Units that is equal to the mass of a prototype agreed upon by international convention and that is nearly equal to the mass of 1000 cubic centimeters of water at the temperature of its maximum density, a unit of force or weight equal to the weight of a ~ mass under a gravitational attraction equal to that of the earth