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poikiloblastic

American  
[poi-kil-uh-blas-tik, poi-kuh-luh-] / pɔɪˌkɪl əˈblæs tɪk, ˌpɔɪ kə lə- /

adjective

Petrography.
  1. (of metamorphic rocks) having small grains of one mineral embedded in metacrysts of another mineral.


Etymology

Origin of poikiloblastic

1915–20; < Greek poikiló ( s ) various + -blastic

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