Pi vs. Pe — Which is Correct Spelling?

The number π (; spelled out as "pi") is a mathematical constant. It is defined in Euclidean geometry as the ratio of a circle's circumference to its diameter, and it also has various equivalent definitions.

(also pē) The 16th letter of the Greek alphabet. See Table at alphabet.

(Mathematics) A transcendental number, approximately 3.14159, represented by the symbol π, that expresses the ratio of the circumference to the diameter of a circle and appears as a constant in many mathematical expressions.

An amount of type that has been jumbled or thrown together at random.

To jumble or mix up (type).

To become jumbled.

The 16th letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek.

(mathematics) An irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its diameter; approximately 3.14159265358979323846264338327950; usually written π.

(metal typesetting) Metal type that has been spilled, mixed together, or disordered.

(typography) pica (conventionally, 12 points = 1 pica, 6 picas ≈ 1 inch).

Piaster.

(metal typesetting) To spill or mix printing type.

(typography) Not part of the usual font character set; especially, non-Roman type or symbols as opposed to standard alphanumeric Roman type.

Pious.

A mass of type confusedly mixed or unsorted.

A Greek letter (

The letter

To put into a mixed and disordered condition, as type; to mix and disarrange the type of; as, to pi a form.

The ratio of the circumference to the diameter of a circle

Someone who can be employed as a detective to collect information

The scientist in charge of an experiment or research project

The 16th letter of the Greek alphabet

An antiviral drug used against HIV; interrupts HIV replication by binding and blocking HIV protease; often used in combination with other drugs