请输入您要查询的英文单词:

 

单词 barium
释义

WordReference Random House Learner's Dictionary of American English © 2024
bar•i•um /ˈbɛriəm, ˈbær-/USA pronunciation   n. [uncountable]
  1. Chemistrya whitish, soft metallic element.

WordReference Random House Unabridged Dictionary of American English © 2024
bar•i•um  (bârē əm, bar-),USA pronunciation n. [Chem.]
  1. Chemistrya whitish, malleable, active, divalent, metallic element, occurring in combination chiefly as barite or as witherite. Symbol: Ba;
    at. wt.: 137.34;
    at. no.: 56;
    sp. gr.: 3.5 at 20°C.
  • bar(ytes) + -ium 1800–10

Collins Concise English Dictionary © HarperCollins Publishers::
barium /ˈbɛərɪəm/ n
  1. a soft silvery-white metallic element of the alkaline earth group. It is used in bearing alloys and compounds are used as pigments. Symbol: Ba; atomic no: 56; atomic wt: 137.327; valency: 2; relative density: 3.5; melting pt: 729°C; boiling pt: 1805°C
Etymology: 19th Century: from bar( yta) + -ium
随便看

 

英语词典包含188688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:2025/7/25 4:19:53