cellularization
/ˌsɛljʊlərʌɪˈzeɪʃn/(also cellularisation)
noun
1Chiefly Embryology. Division of a syncytium into separate cells, especially during embryonic development.
2 Generally. Separation into discrete cells or divisions.
Origin
Early 20th century. From cellular + -ization. Compare later cellularize, cellularized.