adularia
American Heritage Dictionary:
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ad·u·lar·i·a
(ăj'ə-lâr'ē-ə, -lăr'-) 
n.
A variety of transparent or translucent orthoclase.
n.
A variety of transparent or translucent orthoclase.
[Italian, from French adulaire, after Adula, a mountain group of southeast Switzerland.]
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American Heritage Dictionary
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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