Definition of pi-meson:
(n) :
(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.
(n) :
The sixteenth letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek.
(n) :
(letterpress typography) Metal type that has been spilled, mixed together, or disordered.
(v) :
(letterpress typography) To spill or mix printing type.
(adj) :
(typography) Not part of the usual font character set; especially, non-Roman type or symbols as opposed to standard alphanumeric Roman type.
(n) :
(typography) pica (conventionally, 12 points = 1 pica, 6 picas = 1 inch).