| 释义 |
lan·tha·num
\ˈlan(t)thənəm\ noun
(-s)
Etymology: New Latin, from Greek lanthanein to escape notice
: a white soft malleable trivalent metallic element that tarnishes readily in moist air and forms colorless compounds, that occurs in rare-earth minerals and is usually included in the rare-earth group, and that is one of the major components of misch metal — symbol La; see element table |