lanthanum
n. 镧 [化] 镧La
发音
US
/ˈlænθənəm/
US
/ˈlænθənəm/
词形变化
lanthanums
复数
lanthanums
别名
lantanum
lantanium
lanthanium
释义与例句
n.
-
1.
A chemical element (symbol La) with an atomic number of 57: a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air.
镧
不可数 可数 -
2.
An atom of this element.
可数 不可数
词汇关系
词源
From Ancient Greek λανθάνω (lanthánō, “to escape notice”) + -um (“a chemical element”), because it had gone long undetected in mineral ores.
来源：wiktionary