oligoclase

[ol-i-goh-kleys]

ol·i·go·clase

[ol-i-goh-kleys]
noun Mineralogy.
a kind of plagioclase feldspar occurring commonly in white crystals, sometimes shaded with gray, green, or red.

Origin:
1825–35; oligo- + -clase
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Oligoclase is always a great word to know.
So is ort. Does it mean:
a scrap or morsel of food left at a meal.
a chattering or flighty, light-headed person.
Collins
World English Dictionary
oligoclase (ˈɒlɪɡəʊˌkleɪs)
 
n
a white, bluish, or reddish-yellow feldspar mineral of the plagioclase series, consisting of aluminium silicates of sodium and calcium. Formula: NaAlSi3O8.CaAl2Si2O8
 
[C19: from oligo- + -clase]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
oligoclase   (ŏl'ĭ-gō-klās', ō'lĭ-)  Pronunciation Key 
A white to gray triclinic mineral of the plagioclase feldspar group. Oligoclase occurs in igneous rocks with a relatively high silica content, such as granite. Chemical formula: (Na,Ca)(Al,Si)AlSi2O8.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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