## pi

The greek lower-case letter P.

The mathematical constant that is the circumference of a circle divided by its diameter. Pi is written as the greek character pi.

Some have suggested that pi is the wrong choice and a better
constant to describe the geometry of circles would have been 2*pi,
for which they have proposed the name tau. Most practising
mathematicians think this is silly. The xkcd comic strip
*proposed* a compromise between pi and
tau, namely 1.5*pi or "pau".

Last updated: 2013-12-09

### Nearby terms:

Physics Analysis Workbench ♦ PI ♦ **pi** ♦ PIC ♦ pi-calculus ♦ Pick BASIC

Try this search on Wikipedia, OneLook, Google