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pi    音标拼音: [p'ɑɪ]
n. 圆周率;混杂的铅字堆;混乱

圆周率;混杂的铅字堆;混乱

pi
n 1: the ratio of the circumference to the diameter of a circle;
approximately equal to 3.14159265358979323846...
2: someone who can be employed as a detective to collect
information [synonym: {private detective}, {PI}, {private eye},
{private investigator}, {operative}, {shamus}, {sherlock}]
3: the scientist in charge of an experiment or research project
[synonym: {principal investigator}, {PI}]
4: the 16th letter of the Greek alphabet
5: an antiviral drug used against HIV; interrupts HIV
replication by binding and blocking HIV protease; often used
in combination with other drugs [synonym: {protease inhibitor},
{PI}]

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]

Note: The first 1000 decimal digits of the number pi are as
displayed below.
The digits are arranged as five sets of ten digits per
line in twenty lines, proceeding left to right in each
line.
3.
1415926535 8979323846 2643383279 5028841971 6939937510
5820974944 5923078164 0628620899 8628034825 3421170679
8214808651 3282306647 0938446095 5058223172 5359408128
4811174502 8410270193 8521105559 6446229489 5493038196
4428810975 6659334461 2847564823 3786783165 2712019091
4564856692 3460348610 4543266482 1339360726 0249141273
7245870066 0631558817 4881520920 9628292540 9171536436
7892590360 0113305305 4882046652 1384146951 9415116094
3305727036 5759591953 0921861173 8193261179 3105118548
0744623799 6274956735 1885752724 8912279381 8301194912
9833673362 4406566430 8602139494 6395224737 1907021798
6094370277 0539217176 2931767523 8467481846 7669405132
0005681271 4526356082 7785771342 7577896091 7363717872
1468440901 2249534301 4654958537 1050792279 6892589235
4201995611 2129021960 8640344181 5981362977 4771309960
5187072113 4999999837 2978049951 0597317328 1609631859
5024459455 3469083026 4252230825 3344685035 2619311881
7101000313 7838752886 5875332083 8142061717 7669147303
5982534904 2875546873 1159562863 8823537875 9375195778
1857780532 1712268066 1300192787 6611195909 2164201989
[Webster 1913 Suppl. PJC]


Pi \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}.]
[1913 Webster]

76 Moby Thesaurus words for "pi":
ascender, back, ball up, bastard type, beard, belly, bevel,
black letter, body, bollix up, cap, capital, case, compose,
confound, confuse, counter, descender, em, en, face,
fat-faced type, feet, font, foul up, fumble, garble, groove,
impose, italic, jumble, justify, letter, ligature, logotype,
lower case, majuscule, make up, minuscule, mix up, muck up, muddle,
nick, overrun, pi a form, pica, play hob with, point, print,
riffle, roman, sans serif, scramble, screw up, script, set,
set in print, shank, shoulder, shuffle, small cap, small capital,
snafu, snarl up, stamp, stem, tumble, type, type body, type class,
type lice, typecase, typeface, typefounders, typefoundry,
upper case

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.

{(ftp://ftp.ncc.up.pt/pub/prolog/ytoolkit.tar.Z)}.

E-mail: Ze' Paulo Leal .

(1993-03-02)

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  • 1 Million Digits of Pi - Pi Day
    1 Million Digits of Pi The first 10 digits of pi (π) are 3 1415926535 The first million digits of pi (π) are below Why not calculate the circumference of a circle using pi here Or simply learn about pi here Maximize the fun you can have this Pi Day by checking out our Pi Day Merch
  • Pi - Wikipedia
    The number π ( p aɪ ⓘ; spelled out as pi) is a mathematical constant, approximately equal to 3 14159, that is the ratio of a circle's circumference to its diameter It appears in many formulae across mathematics and physics, and some of these formulae are commonly used for defining π, to avoid relying on the definition of the length of
  • Pi ( π ) - Math is Fun
    Draw a circle with a diameter (all the way across the circle) of 1 Then the circumference (all the way around the circle) is 3 14159265 a number known as Pi Pi (pronounced like "pie") is often written using the greek symbol π The definition of π is: of a Circle
  • Pi | Definition, Symbol, Number, Facts | Britannica
    Pi, in mathematics, is the ratio of the circumference of a circle to its diameter Because pi is irrational (not equal to the ratio of any two whole numbers), its digits do not repeat, and an approximation such as 3 14 or 22 7 is often used for everyday calculations
  • What Is Pi? - HowStuffWorks
    Pi is a circle's circumference divided by its diameter (The diameter is twice the radius or double the length from any point on the circle to its center The circumference is the distance around a circle )
  • Pi (π) - Math Tools
    It is defined as the ratio of a circle's circumference to its diameter, and it also has various equivalent definitions It appears in many formulas in all areas of mathematics and physics It is approximately equal to 3 14159 Pi (π) is also a really useful number
  • Pi - Encyclopedia. com
    Pi is one of the most fundamental constants in all of mathematics It is normally first encountered in geometry where it is defined as the ratio of the circumference of a circle to the diameter: π = C d where C is the circumference and d is the diameter
  • Pi Symbol (π)
    The Pi symbol, derived from the Greek letter "π" (pi), is one of the most recognized mathematical symbols worldwide It represents both a letter in the Greek alphabet and a fundamental mathematical constant
  • Pi - π - History of Math and Technology
    Pi, denoted by the Greek letter π, is perhaps one of the most famous and intriguing mathematical constants Defined as the ratio of a circle’s circumference to its diameter, pi is an irrational number, meaning it cannot be expressed as a simple fraction and its decimal representation is non-terminating and non-repeating
  • Pi - Math. net
    Pi is the ratio of the circumference of a circle to its diameter: Using this relationship, we can determine equation for the circumference of a circle by solving for C: where C is the circumference, d is the diameter, and r is the radius of the circle Another well-known formula that uses pi is the area of a circle





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