Synonyms for Segmentation (same or very similar meaning)
WordNet sense 1 ((embryology) the repeated division of a fertilised ovum):
cleavageWordNet sense 2 (the act of dividing or partitioning; separation by the creation of a boundary that divides or keeps apart):
division, partition, partitioning, sectionalisation, sectionalizationFrom the ODE community, based on WordNetadd/edit