upsilon
upsilon
[ʌpˈsʌɪlən, juːp-, ˈʊpsɪlɒn, ˈjuːp-]
noun
[ʌpˈsʌɪlən, juːp-, ˈʊpsɪlɒn, ˈjuːp-]
noun
- the twentieth letter of the Greek alphabet (Υ, υ), transliterated as ‘u’ or (chiefly in English words derived through Latin) as ‘y’
希腊字母表中第二十个字母（译写为u或y，后者多见于源自拉丁语的英语单词中）
■(Upsilon)[followed by Latin genitive](Astronomy)the twentieth star in a constellation
(天文)υ星（星座中第二十颗星）
Upsilon Scorpii.
天蝎座υ星。
■(亦作 upsilon particle)(Physics)a meson thought to contain a b quark bound to its antiparticle, produced in particle accelerators
(物)υ粒子
- Greek, literally slender U', from psilos 'slender', referring to the need to distinguish upsilon from the diphthong oi: in late Greek the two had the same pronunciation
考试词汇表
