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petagram, Pg
A metric unit of mass equal to 1015 grams or one gigatonne (one billion metric tons).

This unit is used in atmospheric science and other scientific contexts where large masses are considered.

This entry is located in the following units: gram-, -gram-, -gram, -grammatic, -grammatical, -grammatically, -gramme, -grammic + (page 15) peta- [PE tuh] + (page 1)