— zeolitic /zee'euh lit"ik/ , adj.
/zee"euh luyt'/ , 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.
[ 1770-80; ze ( în ) to boil + -O- + -LITE ]