feldspar
Use Feldspar in a sentence
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
feldspar or felspar (ˈfɛldˌspɑː, ˈfɛlˌspɑː) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —n | |
| any of a group of hard rock-forming minerals consisting of aluminium silicates of potassium, sodium, calcium, or barium: the principal constituents of igneous rocks. The group includes orthoclase, microcline, and the plagioclase minerals | |
| [C18: from German feldspat(h), from feld field + spat(h) | |
| felspar or felspar | |
| —n | |
| [C18: from German feldspat(h), from feld field + spat(h) | |
| feldspathic or felspar | |
| —adj | |
| fel'spathic or felspar | |
| —adj | |
| 'feldspathose or felspar | |
| —adj | |
| 'felspathose or felspar | |
| —adj | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Feldspar
is always a great word to know.
So is doohickey. Does it mean:
| a gadget; dingus; thingumbob. |
| a stew of meat, vegetables, potatoes, etc. |
Etymonline
Word Origin & History
feldspar
1757, from Ger. Feldspath, from Feld "field" + spath "spar, non-metallic mineral, gypsum."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
| feldspar (fěld'spär', fěl'-) Pronunciation Key
Any of a group of abundant monoclinic or triclinic minerals having the general formula MAl(Al,Si)3O8, where M is either potassium (K), sodium (Na), or calcium (Ca) or less commonly barium (Ba), rubidium (Rb), strontium (Sr), or iron (Fe). Feldspars range from white, pink, or brown to grayish blue in color. They occur in igneous, sedimentary, and metamorphic rocks and make up more than 60 percent of the Earth's crust. When they decompose, feldspars form clay or the mineral kaolinite. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
In various proportions are feldspar and traces of other minerals.
Until now, scientists had believed the moon was made of two basic types of rock: dark basalt and light, calcium-rich feldspar.
The coarse feldspar grains enclosed within the enclave are the same as the feldspar grains that make up the granite outside it.
Feldspar in the rock is moderately to intensely altered to sericite and clay minerals.
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