n.
A dark green to brown or black mineral, ZnAl2O4. Also called zinc spinel.
[After Johan Gottlieb Gahn (1745-1818), Swedish mineralogist.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
