n. A common mineral of the zeolite group with monoclinic crystals, the most usual form being heulandite-Ca (Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O.
the GNU version of the Collaborative International Dictionary of English
n. A mineral of the Zeolite family, often occurring in amygdaloid, in foliated masses, and also in monoclinic crystals with pearly luster on the cleavage face. It is a hydrous silicate of alumina and lime.
The Century Dictionary and Cyclopedia
n. A mineral belonging to the zeolite group.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a group of minerals of the zeolite family consisting of a hydrous aluminum silicate of sodium and calcium