Dictionary
bour•non•ite
Pronunciation: (bôr'nu-nīt", bōr'-, boor'-), [key]—
n. Mineral.
a sulfide of lead, antimony, and copper, PbCuSbS
3, occurring in gray to black crystals or granular masses. Also called
cogwheel ore. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.