poikilitic

[poi-kuh-lit-ik]
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adjective Petrography.

(of igneous rocks) having small crystals of one mineral scattered irregularly in larger crystals of another mineral.

Origin of poikilitic

1830–40; < Greek poikíl(os) various + -ite1 + -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Historical Examples of poikilitic