Poikilitic texture refers to igneous rocks where component crystals contain smaller grains of other minerals within them. In poikilitic rocks, the contained smaller grains are typically within phenocrysts. A poikilitic texture is most easily observed in petrographic thin sections. In some rocks there seem to be little tendency for the minerals to ...
mottled
• (a.) See Poecilitic.
Poi`ki·lit'ic adjective (Geol.) See Pœcilitic . 
(Of igneous rocks) Where large crystals of the host rock enclose small randomly orientated crystals of a different mineral.