Definition of Praseodimium
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.
- Webster's Unabridged Dictionary (1913)
- a metallic chemical element (symbol Pr) with an atomic number of 59.
- The Nuttall Encyclopedia
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