alpha

alpha
[ˈalfə]
noun
  1. the first letter of the Greek alphabet (Α, α), transliterated as ‘a’
    希腊字母表中第一个字母(译写为a)
    ■[as modifier]denoting the first of a series of items or categories, e.g. forms of a chemical compound
    甲,α 项,α 类(一系列项目、分类中的第一位,如化合物的第一种形式)
    alpha interferon α.
    干扰素。
    the α and β chains of haemoglobin.
    α 和 β 链血红蛋白。
    ■(Brit.)a first-class mark given for an examination paper or piece of school or college work
    (英)(学校考试成绩或作业)Α等,甲等
    he had been awarded alpha double plus.
    他得了A++的好成绩。
    ■short for alpha test
    alpha test 的简称
    ■(Alpha)[followed by Latin genitive](Astronomy)the first (typically the brightest) star in a constellation
    (天文)α 星(星座中第一颗星,多为最亮的星)
    Alpha Orionis.
    猎户座 α 星。
    ■[as modifier]relating to alpha decay or alpha particles
    与 α 衰变(或 α 粒子)有关的
    an alpha emitter.
    α 粒子发射体。
    ■[as modifier]denoting the dominant animal or person in a particular group
    (人或动物特定群体中的)头领;首领
    Turner soon proved to be the alpha male.
    特纳很快便证明是男人中的头儿。
  2. a code word representing the letter A, used in radio communication
    (无线电通信中字母A的代码词)A, α ;
symbol for
  1. (α)a plane angle
    (平面角符号) α 角
  2. (α)angular acceleration
    (角度增加符号)α
  3. (α)(Astronomy)right ascension
    (天文)赤经
常用词组
alpha and omega
  1. the beginning and the end (especially used by Christians as a title for Jesus)
    首尾,始终(尤指基督徒对耶稣的称呼)
    ■the essence or most important features
    本质,要素
语源
  1. via Latin from Greek
英语宝典
考试词汇表