Pronunciation: (dē-dō"lu-mī"tu-zā'shun, -mi-, -dol"u-), [key]
—n. Geol., Petrol.
a metamorphic process in which the magnesium in dolomitic rock forms new minerals, as brucite and forsterite, and the calcium forms calcite.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.