'Phenocryst' definitions:
Definition of '
Phenocryst
'
From:
GCIDE
Phenocryst \Phe"no*cryst\, n. [Gr. fai`nesqai to appear + kry`stallos crystal.] (Geol.) One of the prominent embedded crystals of a porphyry. [Webster 1913 Suppl.]
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