Found 2 items, similar to heulandite.
English → English (WordNet) Definition: heulandite heulandite n : a group of minerals of the zeolite family consisting of a hydrous aluminum silicate of sodium and calcium
English → English (gcide) Definition: Heulandite Heulandite \Heu"land*ite\, n. [After Heuland, an English mineralogist.] (Min.) 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. [1913 Webster]