lan.tha.num
n.Symbol La （名词）符号 La A soft, silvery-white, malleable, ductile, metallic rare-earth element, obtained chiefly from monazite and bastnaesite and used in glass manufacture and with other rare earths in carbon lights for movie and television studio lighting. Atomic number 57; atomic weight 38.9; melting point 920=C; boiling point 3,4'9=C; specific gravity 5.98 to '.8'; valence 3.See table at element 镧：一种质软、银白色、有延展性的、可塑性的稀有金属，主要是从独居石和氟碳铈矿中提取出来，用于玻璃工业及电影或电视摄影照明的碳棒灯中。原子序数57；原子量38.9；熔点920=C；沸点3,49'=C；比重5.98到'.8'；原子价3参见 element
来源：New Latin 现代拉丁语 from Greek lanthanein [to escape notice (from the finding of the element hidden in oxide of cerium)] 源自 希腊语 lanthanein [避开注意力（指不被从铈氧化物元素中提取）]
