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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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  • Pi
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  • Pi - Wikipedia
    For instance, Pickover calls π "the most famous mathematical constant of all time", and Peterson writes, "Of all known mathematical constants, however, pi continues to attract the most attention", citing the Givenchy π perfume, the 1998 thriller film Pi, and Pi Day as examples
  • 1 Million Digits of Pi
    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…
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  • 圆周率（数学词汇）_百度百科
    圆周率是指 圆 周长 与 直径 的 比值，即圆周率=圆周长÷直径，也等于 圆面积 与 半径 平方 之比，即圆周率=圆面积÷半径2，一般用希腊字母π表示。 圆周率是一个在数学及物理学中普遍存在的数学常数，是精确计算 圆周长 、 圆面积 、球体积等几何形状的关键值。 在 分析学 里，π可以严格地定义为满足sinx=0的最小 正数 x。 圆周率是一个 无理数，即无限不循环小数。 在日常生活中，通常都用3 14代表圆周率去进行近似计算。 而用九位小数3 141592654便足以应付一般计算。 即使是工程师或物理学家要进行较精密的计算，充其量也只需取值至小数点后几百位 [1]。 一块古巴比伦石匾（约产于公元前1900年至公元前1600年）清楚地记载了圆周率=25 8=3 125 [4]。
  • Número π - Wikipedia, la enciclopedia libre
    La Premio Nobel de Literatura Wisława Szymborska escribió un poema titulado «El número Pi» (Liczba Pi) en el que utiliza, en su orden, los 25 primeros dígitos de π
  • Pi (π) - Math is Fun
    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 With a diameter of D the circumference is πD: The definition of π is: of a Circle
  • Pi — Wikipédia
    π (pi), appelé parfois constante d’Archimèdea, est un nombre représenté par la lettre grecque du même nom en minuscule (π) C’est le rapport de la circonférence d’un cercle à son diamètre (le même pour tous les cercles) dans un plan euclidien
  • Π - 维基百科，自由的百科全书
    渗透压。 計算機科學中的 π-演算。 微觀經濟學 中的 利潤。 經濟學 中的 物價指數。 白金漢π定理 中的 無因次量。 皮萨诺周期， π (n) ${\displaystyle \pi (n)}$ 为 斐波那契数列 模 n ${\displaystyle n}$ 的最小正 周期。 西里爾字母 的 П 及 拉丁字母 的 P 都是從 Π 變來。
  • Pi | Definition, Symbol, Number, History, Applications, Facts . . .
    pi (π), in mathematics, the ratio of the circumference of a circle to its diameter The Greek letter π was first used by British mathematician William Jones in 1706 to represent the ratio and was later popularized by Swiss mathematician Leonhard Euler





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