Phenocryst
Pronunciation : Phe"no*cryst
Part of Speech : n.
Definition : Defn: One of the prominent embedded crystals of a porphyry.
[Gr. to appear + crystal.] (Geol.)
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder