lanthanum
/ˈlænθənəm/
构词拆解
- -um
- Denotes singular grammatical number. · (chemistry) Forms the ends of the names of certain elements (such as molybdenum and platinum).
词源链
- 英语English
lanthanum
词源说明
From Ancient Greek λανθάνω (lanthánō, “to escape notice”) + -um (“a chemical element”), because it had gone long undetected in mineral ores.
释义
名词noun
- 1uncountableA chemical element (symbol La) with an atomic number of 57: a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air.
- 2countableAn atom of this element.