(n) :
Alternative form of rare earth element. [(chemistry) Any of a group of seventeen soft, lustrous, sometimes magnetic metals that form trivalent salts, which includes the lanthanides plus yttrium, scandium.]
(n) :
Alternative form of rare earth element. [(chemistry) Any of a group of seventeen soft, lustrous, sometimes magnetic metals that form trivalent salts, which includes the lanthanides plus yttrium, scandium.]