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phencyclidine
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phenocryst

phe·no·cryst [ fnə krìst ] (plural phe·no·crysts)


noun 
Definition:
 
large crystal: a large embedded crystal in a porphyritic rock

[Late 19th century. < French phénocryste< phéno- "appearing" (< Greek phainein "to show") + Greek krustallos "ice"]

phe·no·crys·tic [ fnə krístik ] adjective
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