Corundum

 

 

 

Corundum

 

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Corundum

 

Meaning of term corundum

Corundum (n.) The earth alumina, as found native in a crystalline state, including sapphire, which is the fine blue variety, the oriental ruby, or red sapphire, the oriental amethyst, or purple sapphire, and adamantine spar, the hair-brown variety. It is the hardest substance found native, next to the diamond.

 

Source: http://www.mso.anu.edu.au/~ralph/OPTED/v003/wb1913_c.html

Author : OPTED is a public domain English word list dictionary, based on the public domain portion of "The Project Gutenberg Etext of Webster's Unabridged Dictionary" which is in turn based on the 1913 US Webster's Unabridged Dictionary

 

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Corundum