petagram
nounEtymology From peta- + gram.
1
Metrology An SI unit of mass equal to 10¹⁵ grams. Symbol: Pg
› An SI unit of mass equal to 10¹⁵ grams.…
2
Metrology Sometimes used in Carbon Dioxide numbers, it is equivalent to Metric Gigatons (Giga) 10⁹ x (Ton) 10³ x (kg) 10³ = 10¹⁵