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poikiloblastic

[poi-kil-uh-blas-tik, poi-kuh-luh-]
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adjective Petrography.
  1. (of metamorphic rocks) having small grains of one mineral embedded in metacrysts of another mineral.
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Origin of poikiloblastic

1915–20; < Greek poikiló(s) various + -blastic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018