any of various meteorites composed mainly of rock-forming silicates, especially olivine, plagioclase, and pyroxene, and classified as achondrites or chondrites.
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a meteorite composed mainly of silicates
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
See under meteorite.
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