单词 | point group |
释义 | point groupnoun Crystallography.a class of crystals determined by a combination of their symmetry elements, all crystals left unchanged by a given set of symmetry elements being placed in the same class. Also called symmetry class. Origin of point groupFirst recorded in 1900–05 Words nearby point grouppoint epidemic, pointer, Pointers, point estimate, point estimation, point group, point guard, pointillage, pointillé, pointillism, pointillistic Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for point grouppoint group nouncrystallog another term for crystal class 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 |
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