|≈||approximately equal to|
|digits||indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …)|
The attoliter or attolitre is a common metric unit of volume. It is equal to 10-21 cubic meters. Plural name is attoliters.
The cubic femtometre or cubic femtometer is the unit of volume. Its symbol is fm3. It is the volume of a cube with edges one femtometre in length.