pi

pi1
[pʌɪ]
noun
  1. the sixteenth letter of the Greek alphabet (Π, π), transliterated as ‘p’
    希腊字母表中第十六个字母(译写为p)
    Greek
    ■the numerical value of the ratio of the circumference of a circle to its diameter (approximately 3.14159)
    圆周率
    ■(Pi)[followed by Latin genitive](Astronomy)the sixteenth star in a constellation
    (天文)π星(星座中第十六颗星)
    Pi Herculis.
    武仙座π星。
    ■(Chemistry & Physics)relating to or denoting an electron or orbital with one unit of angular momentum about an internuclear axis
    (化,物理)(具有一个核间轴角动量单位的)电子,轨函数
symbol for
  1. ■(π)the numerical value of pi
    圆周率值
    ■(Π)osmotic pressure
    渗透压力
    ■(Π)mathematical product
    乘积
语源
  1. Greek

pi2
[pʌɪ]
adjective
  1. (Brit. informal). short for pious
    (英,非正式)。 pious 的简称
英语宝典
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