Meaning of poikiloblastic

poi•kil•o•blas•tic

Pronunciation: (poi-kil"u-blas'tik, poi"ku-lu-), [key]
— adj. Petrog.
  1. (of metamorphic rocks) having small grains of one mineral embedded in metacrysts of another mineral.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.