andradite 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 variety of garnet, CaFe(SiO), sometimes used as a gem
Origin: after J. B. de Andrada (c. 1763-1838), Brazilian geologist
andradite definition by American Heritage Dictionary
A green to brown or black calcium-iron garnet, Ca3Fe2(SiO4)3.
Origin: After José Bonifácio de Andrada e Silva.