corundom
English Thesaurus
1. very hard mineral used as an abrasive (noun.substance)
| hypernym | : | mineral, |
| definition | : | solid homogeneous inorganic substances occurring in nature having a definite chemical composition (noun.substance) |
| hyponym | : | ruby, |
| definition | : | a transparent deep red variety of corundum; used as a gemstone and in lasers (noun.substance) |
| hyponym | : | sapphire, |
| definition | : | a precious transparent stone of rich blue corundum valued as a gemstone (noun.substance) |
| substance meronym | : | emery, |
| definition | : | a hard grey-black mineral consisting of corundum and either hematite or magnetite; used as an abrasive (especially as a coating on paper) (noun.substance) |
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