|≈||approximately equal to|
|digits||indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …)|
A revolution is a unit of angle equal to 360°, defined as a complete turn around a circle. Plural name is revolutions.
A turn is used in anglular measurement equal to 360 degrees. Plural name is turns.