| 单词 | plumbaginous | 
| 释义 | plumbaginousadj. Now rare.   Consisting of or containing plumbago or graphite. ΘΚΠ the world > the earth > minerals > types of mineral > native elements and alloys > 			[adjective]		 > native carbon plumbaginous1796 kishy1825 1796    R. Kirwan Elements Mineral. 		(ed. 2)	 II. 184  				Plombaginous, or micaceous iron ore. 1822    J. Stodart  & M. Faraday in  Philos. Trans. 		(Royal Soc.)	 112 264  				The surface..is found to be covered with a thick coat of grey metallic plumbaginous powder. 1845    C. Lyell Trav. N. Amer. I. 249  				In the plumbaginous anthracite of Worcester the proportion of volatile matter is about 3 per cent. 1871    Amer. Naturalist 5 457  				These schists are highly plumbaginous. 1887    Manufacturer & Builder Aug. 192/1  				Unprotected parts of cast-iron sluice valves..were converted into a soft, plumbaginous substance. 1998    Appl. Catalysis A. 166 366/1  				On insertion of shaft..into the reaction chamber, the six plumbaginous Teflon gaskets turn into as many guiding and tightening sealing rings. This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022). <  | 
	
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