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Pi \Pi\ (p[=e]` [imac]"), n. (Chem.) The inorganic orthophoshate ion; -- a symbol used in biochemistry. [acronym] [PJC] Pi \Pi\ (p[imac]), n. [See {Pica}, {Pie} magpie, service-book.] (Print.) A mass of type confusedly mixed or unsorted. [Written also {pie}.] [1913 Webster] Pi \Pi\ (p[imac]), n. [Gr. pi^.] 1. A Greek letter ([Pi], [pi]) corresponding to the Roman letter {P}. [Webster 1913 Suppl.] 2. Specifically: (Math.) The letter [pi], [Pi], 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 twenty decimal places, is 3.14159265358979323846 (see note). The number pi is an irrational number, i.e. it cannot be expressed as the quotient of two integers. It is also a transcendental number, i.e. it cannot be expressed as a root of an algebraic equation with a finite number of terms; 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. [Webster 1913 Suppl. +PJC] pis |
Dot Coms with the word pis in them As of 12/11/08
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