corundum
The American Illustrated Medical Dictionary · 1913 · p. 7
(ko-run’dum). the hardest mineral next to the diamond. used as an abrasive in dentistry.
Bu kavram başka kaynaklarda da geçiyor
Adair's New Encyclopedia (1923)
Webster's Condensed Dictionary- A Condensed Dictionary of the English Language (1909)
Chamber's Twientieth Century Dictionary (1908)
Chandler's Encyclopedia (1898)
Webster's Practical Dictionary- A Practical Dictionary of the Englih Language (1884)
An Illustrated Dictionary of Words Used In Art and Archealogy. (1883)
Zell's Condensed Dictionary (1879)
Dictionary of Science, Literature and Art (1854)
Dictionary of Science, Literature and Art (1842)
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