Submitted by György Chityil ... on Fri, 01/19/2018 - 22:14 Hierarchy: NounDescription: {{embryology}} The expansion of one cell sheet over other cells, as takes place during gastrulation.Ngram: epibolyNgram Text: epibolySource: WiktionaryIssue: 0Wiktionary tag: embryologyNgram Count: 1