Pi

Greek Letter Pi (Πι - Π)

The Semitic form probably had no meaning. The Greek form is used for the circumference of a circle with unit diameter. Why a version of this letter with the right upright rounded became the Roman "P", matching the Greek letter for "R", is anybody's guess.

"Π" Letter in mathematics and in science

Π represents:

• the product operator in mathematics.
• a plane

π represents:

• Archimedes' constant, the ratio of a circle's circumference to its diameter
• the prime counting function
• profit in microeconomics and game theory
• inflation in macroeconomics, expressed as a constant with respect to time
• the state distribution of a Markov chain
• a type of covalent bond in Chemistry (Pi bond)
• a pion (pi meson)

Greek words with "π"

πόλη, πέτρα