Kata bahasa Indonesia
English word
HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
OXFORD DICTIONARY
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WORDNET DICTIONARY
Noun corundum has 1 sense
- corundum(n = noun.substance) corundom - very hard mineral used as an abrasive; is a kind of mineral
has particulars: alumina, aluminium oxide, aluminum oxide, ruby, sapphire
CIDE DICTIONARY
corundum, n. [From Hind. kurand corundum stone.].
The mineral alumina (Al2O3 ), as found native in a crystalline state. Transparent varieties are used as gemstones, 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. [1913 Webster]
" The name corundum is sometimes restricted to the non-transparent or coarser kinds. Emery is a dark-colored granular variety, usually admixed with magnetic iron ore."
[1913 Webster]
OXFORD DICTIONARY
corundum, n. Mineral. extremely hard crystallized alumina, used esp. as an abrasive, and varieties of which, e.g. ruby and sapphire, are used for gemstones.
Etymology
Tamil kurundam f. Skr. kuruvinda ruby