corundom

Definitions of corundom

1. noun

   very hard mineral used as an abrasive
   synonyms: corundum

   types:

   alumina, aluminium oxide, aluminum oxide

   any of various forms of aluminum oxide occurring naturally as corundum

   ruby

   a transparent deep red variety of corundum; used as a gemstone and in lasers

   sapphire

   a precious transparent stone of corundum, typically a rich blue, valued as a gemstone

   alundum

   a substance made of fused alumina

   star sapphire

   a sapphire that when cut shows a starlike figure in reflected light because of its crystalline structure

   type of:

   mineral

   solid homogeneous inorganic substances occurring in nature having a definite chemical composition