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Graphitic | Define Graphitic at Dictionary.com
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日期:2026-04-19
noun a very common mineral, soft native carbon, occurring in black to dark-gray foliated masses, with metallic luster and greasy feel: used for pencil leads, as a ... 1796, from Ger. Graphit "black lead," coined 1789 by Ger. mineralogist Abraham Gottlob W...看更多













