gastraea

noun gas·traea
variants: or less commonly gastrea \gaˈstrēə\

Definition of gastraea

plural -s
:a hypothetical metazoan ancestral form corresponding in organization to a simple invaginated gastrula

gastraeal

\(ˈ)ga¦strēəl\ adjective

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Origin and Etymology of gastraea

New Latin, from Greek gastr-, gastēr belly


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