|≈||approximately equal to|
|digits||indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …)|
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.
The short hundredweight or cental of 100 lb (45.359237 kg) is used in the US and Canada.