gamma

名词 gamma:

1. the 3rd letter of the Greek alphabet
2. a unit of magnetic field strength equal to one-hundred-thousandth of an oersted
3. Portuguese navigator who led an expedition around the Cape of Good Hope in 1497; he sighted and named Natal on Christmas Day before crossing the Indian Ocean (1469-1524)
   同义词：da Gamma, Vasco da Gamma

1. The act or process of destroying most microorganisms in certain foods, such as fish or clam meat, by irradiating them with gamma rays or other radiation to prevent spoilage.
   射线杀菌法破坏某种食品，如鱼或蚌肉内的大部分微生物的行为或过程，通过γ射线或其它放射线辐射的防止变质
2. Nuclear disintegration or transformation caused by absorption of high-energy radiation, as of gamma rays.
   光致分裂由吸收高能量辐射、如射线而引起的核分裂或核转换

gam.ma

n.（名词）
The third letter of the Greek alphabet.See table at alphabet
希腊字母表的第三个字母参见 alphabet
The third item in a series or system of classification.
第三个：一第列或分类系统中的第三个事物
A unit of magnetic field strength equal to one hundred thousandth (0-5) of an oersted.
伽马：磁场强度的一种单位，相当于一厄斯特的万分之一 (0-5)
A unit of mass equal to one millionth (0-') of a gram.
微克：质量的一种单位，相当于一克的百万分之一(0-')
Chemistry The third position from a designated carbon atom in an organic molecule at which an atom or a radical may be substituted.
【化学】 第三位：在有机分子中从一指定碳原子后第三个位置，在此一个原子或原子团可能被替代

来源：
Middle English
中古英语
from Greek
源自 希腊语
[of Phoenician origin] ; akin to Hebrew gomel [gimel]
[源于腓尼基语] ；类似于 希伯来语 gomel [希伯来字母系统第三个字母]