1. [n]  the 16th letter of the Greek alphabet
2. [n]  the scientist in charge of an experiment or research project
3. [n]  someone who can be employed as a detective to collect information
4. [n]  the ratio of the circumference to the diameter of a circle

Pi
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1. \Pi\ (p[imac]), n. [Gr. pi^.]
   1. A Greek letter ([Pi], [pi]) corresponding to the Roman
      letter {P}.
   2. Specif.: (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 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.
   

2. \Pi\, n. [See {Pica}, {Pie} magpie, service-book.] (Print.)
   A mass of type confusedly mixed or unsorted. [Written also
   {pie}.]
   

3. \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}.]
   

An interface between Prolog application programs and the X Window System that aims to be independent from the Prolog engine, provided that it has a Quintus foreign function interface (e.g. SICStus and YAP). It is mostly written in Prolog and is divided in two libraries: Edipo - the lower level interface to the Xlib functions; and Ytoolkit - the higher level user interface toolkit.

E-mail: Ze' Paulo Leal <[email protected]>.