cellulation

https://doi.org/10.1351/goldbook.14261
Division of the growth front of individual or groups of dominant lamellae into divergent "cells", with the impurities and the less crystallizable molecules segregated between the cells and at the spherulite boundaries.
Source:
PAC, 2011, 83, 1831. (Definitions of terms relating to crystalline polymers (IUPAC Recommendations 2011)) on page 1860 [Terms] [Paper]