Definition of gastrula Gastrula

gas•tru•la

We found 5 definitions of gastrula from 4 different sources.

What does gastrula mean?

WordNet

Noun

Plural: gastrulas

gastrula - double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm

conceptus, fertilized egg, embryo an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life

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Wiktionary

gastrula (Noun)
A stage in the development of embryos of most animals consisting of a two-layered sac of ectoderm and endoderm.

Webster DictionaryWebster's Unabridged Dictionary 📘

gastrula (n.)
An embryonic form having its origin in the invagination or pushing in of the wall of the planula or blastula (the blastosphere) on one side, thus giving rise to a double-walled sac, with one opening or mouth (the blastopore) which leads into the cavity (the archenteron) lined by the inner wall (the hypoblast). See Illust. under Invagination. In a more general sense, an ideal stage in embryonic development. See Gastraea.
gastrula (a.)
Of or pertaining to a gastrula.