Gastrula (noun) Definition, Meaning & Examples

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noun, plural gas·tru·las, gas·tru·lae [gas-troo-lee]. /ˈgæs trʊˌli/. Embryology.
  1. a metazoan embryo in an early state of germ layer formation following the blastula stage, consisting of a cuplike body of two layers of cells, the ectoderm and endoderm, enclosing a central cavity, or archenteron, that opens to the outside by the blastopore: in most animals progressing to the formation of a third cell layer, the mesoderm.
noun plural -las or -lae (-ˌliː)
  1. a saclike animal embryo consisting of three layers of cells (ectoderm, mesoderm, and endoderm) surrounding a central cavity (archenteron) with a small opening (blastopore) to the exterior
Plural gastrulas gastrulae (găs′trə-lē′)
    Gastrula (noun) Definition, Meaning & Examples

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