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Long ton, also known as the imperial ton or displacement ton is the name for the unit called the "ton" in the avoirdupois or Imperial system of measurements standardised in the thirteenth century that is used in the United Kingdom and several other British Commonwealth of Nations countries alongside the mass-based metric tonne defined in 1799.
decagram or decagramme is equal to 10 gram (unit of mass), comes from a combination of the metric prefix deca (da) with the gram (g). Plural name is decagrams.