Pi (letter)


Pi is the sixteenth letter of the Greek alphabet, representing the sound. In the system of Greek numerals it has a value of 80. It was derived from the Phoenician letter Pe. Letters that arose from pi include Latin P, Cyrillic Pe, Coptic pi, and Gothic pairthra.

Symbol

The uppercase letter Π is used as a symbol for:
In science and engineering:
The lowercase letter π is used as a symbol for:
An early form of pi was, appearing almost like a gamma with a hook.

Variant pi

Variant pi or "pomega" is a glyph variant of lowercase pi sometimes used in technical contexts. It resembles a lowercase omega with a macron, though historically it is simply a cursive form of pi, with its legs bent inward to meet. It was also used in the minuscule script. It is a symbol for:
The various forms of pi are present in Unicode as:
These characters are used only as mathematical symbols. Stylized Greek text should be encoded using the normal Greek letters, with markup and formatting to indicate text style.