n. A fibrous zeolite mineral, being a sodium aluminosilicate, of the chemical formula Na2Al2Si3O10·2H2O.
the GNU version of the Collaborative International Dictionary of English
n. A zeolite occuring in groups of glassy acicular crystals, and in masses which often have a radiated structure. It is a hydrous silicate of alumina and soda.
The Century Dictionary and Cyclopedia
n. A zeolitic mineral occurring in slender acicular crystals, also in masses with a fibrous and radiating structure, generally of a white color and transparent to translucent.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a group of minerals of the zeolite family consisting of a hydrous silicate of sodium and aluminum
Word Usage
"They form a large class of minerals of which Thomsonite and natrolite may be selected as examples --"