sand·stone

[sand-stohn]
noun
a common sedimentary rock consisting of sand, usually quartz, cemented together by various substances, as silica, calcium carbonate, iron oxide, or clay.

Origin:
1660–70; sand + stone

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
sandstone (ˈsændˌstəʊn) [Click for IPA pronunciation guide]
 
n
any of a group of common sedimentary rocks consisting of sand grains consolidated with such materials as quartz, haematite, and clay minerals: used widely in building

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Sandstone is always a great word to know.
So is bezoar. Does it mean:
a gadget; dingus; thingumbob.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
American Heritage
Science Dictionary
sandstone   (sānd'stōn')  Pronunciation Key 
A medium-grained sedimentary rock consisting of fine to coarse sand-sized grains that have been either compacted or cemented together by a material such as silica, iron oxide, or calcium carbonate. Although sandstone usually consists primarily of quartz, it can also consist of other minerals, and it can vary in color from yellow or red to gray or brown.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

sandstone definition


A sedimentary rock formed of sand-sized grains that have been either compacted or cemented together. Altough sandstone usually consists primarily of quartz, it can also consist of other minerals.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
And new storage options may be opening up, ranging from offshore sediments to
  basalt, briny aquifers to porous sandstone.
The sea receded, and as the former seabed became a desert, the wind began to
  plane away the sandstone and shale above the bones.
The bluff's golden sandstone has been worn down by water and wind into stunning
  sculptures and patterns.
The fort features exotic palaces built of red sandstone.
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