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Petagram or petagramme is equal to 1015 gram (unit of mass), comes from a combination of the metric prefix peta (P) with the gram (g). Plural name is petagrams.
Decigram or decigramme is equal to 10-1 gram (unit of mass), comes from a combination of the metric prefix deci (d) with the gram (g). Plural name is decigrams.