n. 镨

[化] 镨Pr

[医] 镨(59号元素)

[ 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
<noun.substance>

Praseodymium \Pra`se*o*dym"i*um\, n. [Praseo- + didymium.]
(Chem.)
An elementary substance, one of the constituents of didymium;
-- so called from the green color of its salts. Symbol Ps.
Atomic weight 143.6.