phenocryst

noun
phe·no·cryst | \ ˈfē-nə-ˌkrist \

Definition of phenocryst 

: one of the prominent embedded crystals of a porphyry

Other words from phenocryst

phenocrystic \ˌfē-nə-ˈkri-stik \ adjective

First Known Use of phenocryst

1889, in the meaning defined above

History and Etymology for phenocryst

French phénocryste, from Greek phainein to show + krystallos crystal — more at fancy

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The first known use of phenocryst was in 1889

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