Dictionary
a•lu•no•gen
Pronunciation: (u-lOO'nu-jun), [key]—
n.
a mineral, hydrous sulfate of aluminum, Al
2(SO
4)
3·18H
2O, occurring as a white, fibrous crust on quarry or mine walls.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.