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单词 face symbol
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face symbol
face symbol n. Crystallography a symbol specifying the face of a crystal or other polyhedron, esp. the set of Miller indices (see Miller index n. at Miller n.2).
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face symbol1857
1857 Philos. Trans. (Royal Soc.) 147 183 The letters of a face-symbol may be taken forwards or backwards from any letter without altering the meaning of the symbol.
1903 Athenæum 17 Jan. 86/3 How to convert the face-symbols of Naumann into those of Miller.
1959 C. S. Hurlbut Dana's Man. Mineral. (ed. 17) ii. 32 The zone symbols are inclosed in brackets, as [uvw], to distinguish them from face and form symbols.
1994 Proc. Royal Soc. A. 444 229 The face symbol for the edge-stellated derivative is AiBjCk.
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