gadolinite[gad′ō lin īt′]
gadolinite definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a dark green to black, hard, radioactive mineral, beryllium iron yttrium silicate, BeFeYSiO, that is an ore of various rare-earth elements
Origin: German gadolinit, after J. Gadolin (1760-1852), Finnish chemist who isolated it
gadolinite definition by American Heritage Dictionary
A dark green or greenish-black silicate mineral, Be2FeY2Si2O10, containing several of the rare earths in combination with iron.
Origin: After Johan Gadolin (1760-1852), Finnish chemist.