Dictionary![]() ![]() pra•se•o•dym•i•umPronunciation: (prā"zē-ō-dim'ē-um, prā"sē-), [key] —n. Chem. a rare-earth, metallic, trivalent element, named from its green salts. Symbol: Pr; at. wt.: 140.91; at. no.: 59; sp. gr.: 6.77 at 20°C. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
|