tau

tau
[tɔː, taʊ]
noun
  1. the nineteenth letter of the Greek alphabet (T, τ), transliterated as ‘t’
    希腊字母表中第十九个字母(译写为t)
    ■(Tau)[followed by Latin genitive](Astronomy)the nineteenth star in a constellation
    (天文)τ星(星座中第十九颗星)
    Tau Ceti.
    鲸鱼座τ星。
    ■(全称 tau particle 或 tau lepton)(Physics)an unstable subatomic particle of the lepton class, with a charge of -1 and a mass roughly 3,500 times that of the electron
    (物理)τ粒子
语源
  1. Greek
英语宝典
考试词汇表