Dictionary  ze•o•litePronunciation: (zē'u-līt"), [key] —n. Mineral. any of a group of hydrated silicates of aluminum with alkali metals, commonly occurring as secondary minerals in cavities in basic volcanic rocks: used for their molecular sieve properties because they undergo dehydration with little or no change in crystal structure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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