| 释义 |
bar·i·um
\ˈba(a)rēəm, ˈber-, ˈbār-\ noun
(-s)
Etymology: New Latin, from bar- + -ium
: a silver-white malleable toxic bivalent metallic element of the alkaline-earth group that tarnishes rapidly in air, that occurs only in combination especially as barite and witherite, that is made by reduction of barium oxide or by electrolysis of a fused salt (as barium chloride), and that is used in the form of alloys chiefly as a getter in electron tubes — symbol Ba; see element table |