Definition of Corundum in English :
Define Corundum in English
Corundum meaning in English
Meaning of Corundum in English
Pronunciation of Corundum in English
Corundum pronunciation in English
Pronounce Corundum in English
Corundum
see synonyms of corundumNoun
WordNet Lexical Database for English. Princeton University. 2010.
Corundum
see synonyms of corundumnoun
a white, grey, blue, green, red, yellow, or brown mineral, found in metamorphosed shales and limestones, in veins, and in some igneous rocks. It is used as an abrasive and as gemstone; the red variety is ruby, the blue is sapphire. Composition: aluminium oxide. Formula: Al2O3. Crystal structure: hexagonal (rhombohedral)
Collins English Dictionary. Copyright © HarperCollins Publishers
Corundum
see synonyms of corundum noun
a very hard mineral, aluminum oxide, Al2O3: a dark, coarse variety (emery) is used for grinding and polishing; clear, transparent varieties (ruby, sapphire) are used as gems
see also Mohs scaleWebster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.
Corundum
see synonyms of corundumn.
An extremely hard mineral, aluminum oxide, Al2O3, sometimes containing iron, magnesia, or silica, that occurs in gem varieties such as ruby and sapphire and in a common black, brown, or blue form used chiefly in abrasives.
The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.