[gas-troo-ley-shuh n]
noun Embryology.
  1. the formation of a gastrula.
  2. any process, as invagination, by which a blastula or other form of embryo is converted into a gastrula.

Origin of gastrulation

First recorded in 1875–80; gastrulate + -ion Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for gastrulation

Historical Examples of gastrulation

British Dictionary definitions for gastrulation


  1. embryol the process in which a gastrula is formed from a blastula by the inward migration of cells
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

gastrulation in Medicine


  1. Transformation of the blastula into the gastrula.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.