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单词 macropinacoid
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macropinacoid
macropinacoid n.
Brit. /ˌmakrə(ʊ)ˈpɪnəˌkɔɪd/
,
U.S. /ˌmækroʊˈpɪnəˌkɔɪd/
,
/ˌmækrəˈpɪnəˌkɔɪd/
Crystallography a pinacoid parallel to the vertical and macrodiagonal axes of a crystal.
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the world > matter > chemistry > crystallography (general) > crystal (general) > crystals (other miscellaneous) > [noun] > crystal planes
pinacoid1858
macropinacoid1883
1883 Encycl. Brit. XVI. 360/2 The limiting macropinacoid.
1960 F. H. Pough Field Guide Rocks & Minerals (ed. 3) iv. 50 The face pairs paralleling each other at opposite ends of the axes are the pinacoids, known respectively as basal, front, and side, or basal, macro- and brachypinacoids.
extracted from macro-comb. form
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as lemmas
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