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Webster 1913 Edition

Heulandite

Heu′land-ite

,
Noun.
[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.

Webster 1828 Edition

Heulandite

HEU'LANDITE

,
Adj.
[from M. Heuland.] A mineral, occurring massive, frequently globular, or crystallized in the form of a right oblique-angled prism. It has been ranked among the zeolites,but is now considered as distinct.

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