单词 | emery |
释义 | emery [`em·ǝ·rē] MATERIALS An abrasive which is composed of pulverized, impure corundum; used in polishing and grinding. MINERALOGY A fine, granular, gray-black, impure variety of corundum containing iron oxides, either hematite or magnetite; occurs as masses in limestone and as segregations in igneous rock. |
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