Hectogram, Mass
hecto- (symbol h) is a SI prefix in the SI system of units denoting a factor of 102 (100). It is rarely used, except for certain specific applications: hectogram, in agronomy, for quantities of animal feed (hectogram/animal) and for measures of agricultural productivity (hectogram/hectare); also used in Italy, abbreviated as etto, for retail sale of cold cuts and meat. Read more 
Metric
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Avoirdupois (U.S.)
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Mechanics