Dictionary
prehn•ite
Pronunciation: (prā'nīt, pren'īt), [key]—
n.
a mineral, hydrous calcium aluminum silicate, Ca
2Al
2Si
3O
10(OH)
2, occurring in light-green reniform aggregates or tabular crystals.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.