Didymium

[di'dimjәm]

解释:

(n.) A rare metallic substance usually associated with the metal cerium; -- hence its name. It was formerly supposed to be an element, but has since been found to consist of two simpler elementary substances, neodymium and praseodymium. See Neodymium, and Praseodymium.

巴兹尔录入

解释:

n. a supposed element discovered in 1841 so named from being as it were twin brother of lanthamum.

哈利整理