请输入您要查询的英文单词:

 

单词 roentgen
释义

roentgen

/ˈrəːntɡən / /ˈrʌntdʒən / /ˈrɒntɡən /
(also röntgen , abbreviation R)
noun
A unit of ionizing radiation, the amount producing one electrostatic unit of positive or negative ionic charge in one cubic centimetre of air under standard conditions.She talked about rems and rads and roentgens per hour, and at first, he tried to memorize her words, but he wasn't able to commit the information to memory....
  • A lethal exposure of radiation ranges from 300 to 500 roentgens an hour; levels in the tour areas vary from 15 to several hundred microroentgens an hour.
  • Some paramecium can withstand 200,000 roentgens.

Origin

1920s: named after Wilhelm Conrad Röntgen (1845–1923), German physicist, discoverer of X-rays.

随便看

 

英语词典包含243303条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2024/12/25 9:14:09