praseodymium
pra·seo·dym·ium (prā′zē ō dim′ē əm, -sē-)
noun
Etymology: ModL < praseodymia, a rare earth (< Gr prasios: see prase) + ModL (di)dymium (see didymium): so named (1885) by C. A. von Welsbach (1858-1929), Austrian chemist, from its spectroscopic line and from being split from didymium
Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.
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This is an amaazing element. Its atomic number is 59 and it has 82 neutrons. It is used in aircraaft engines, coloring glass, studio lighting, and ceramics. The word originates from the Greek words 'pracios' maening green and 'didymos' meaning twin.
Posted by anonymous 66 days ago.