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Pi
(), n.[See Pica, Pie magpie, service-book.] (Print.) A mass of type confusedly mixed or unsorted. [Written also pie.]
Pi
v. t.[imp. & p. p.Pied (); p. pr. & vb. n.Pieing ().] (Print.) To put into a mixed and disordered condition, as type; to mix and disarrange the type of; as, to pi a form. [Written also pie.]
Pi
(p), n.[Gr. pi^.]
1. A Greek letter (, ) corresponding to the Roman letter P.
2. Specif.: (Math.) The letter , , as used to denote the number or quotient approximately expressing the ratio of the circumference of a circle to its diameter; also, the quotient or the ratio itself. The value of the quotient pi, to eight decimal places, is 3.14159265. The quotient pi cannot be expressed as a root of an algebraic equation; and from this fact follows the impossibility of the quadrature of the circle by purely algebraic processes, or by the aid of a ruler and compass.
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