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单词 plagioclase
释义

WordReference Random House Unabridged Dictionary of American English © 2024
pla•gi•o•clase  (plājē ə klās′),USA pronunciation n. 
  1. Mineralogyany of the feldspar minerals varying in composition from acidic albite, NaAlSi3O8, to basic anorthite, CaAl2Si2O8, found in most igneous rocks: shows twinning striations on good cleavage surfaces. Also called soda-lime feldspar. 
  • 1865–70; plagio- + -clase
pla•gi•o•clas•tic  (plā′jē ə klastik),USA pronunciation adj. 
Collins Concise English Dictionary © HarperCollins Publishers::
plagioclase /ˈpleɪdʒɪəʊˌkleɪz/ n
  1. a series of feldspar minerals consisting of a mixture of sodium and calcium aluminium silicates in triclinic crystalline form: includes albite, oligoclase, and labradorite

plagioclastic /ˌpleɪdʒɪəʊˈklæstɪk/ adj
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