lanthanum
lanthanum[ˈlanθənəm]noun- [mass noun]the chemical element of atomic number 57, a silvery-white rare earth metal(Symbol: La)
(化学元素)镧(符号:La)
语源- mid 19th cent.: from Greek lanthanein 'escape notice' (because it was long undetected in cerium oxide) + -um
考试词汇表