Praseodymium

[,preiziәu'dimiәm]

解释:

(noun.) a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process.

整理:马提--From WordNet

解释:

(n.) An elementary substance, one of the constituents of didymium; -- so called from the green color of its salts. Symbol Ps. Atomic weight 143.6.

校对:雷明顿