pi
noun
°The name of the sixteenth letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek.
°An irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its diameter; approximately 3.1415926535897932384626433832795; usually written π.
verb
°To spill or mix printing type. Also, "to pie".
adjective
°Not part of the usual font character set; especially, non-Roman type or symbols as opposed to standard alphanumeric Roman type.
abbreviation
°pica (conventionally, 12 points = 1 pica, 6 picas = 1 inch).
°piaster.
synonyms: archimedes' constant, ludolph's constant, ludolph's number