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gas·tru·la  (găstrə-lə)
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Tweet n. pl. gas·tru·las or gas·tru·lae (-lē′) An embryo at the stage following the blastula, after the movement of cells results in the formation of the three germ layers, ectoderm, mesoderm, and endoderm. [New Latin : Greek gastēr, gastr-, belly + Latin -ula, feminine diminutive suff.] gastru·lar (-lər) adj. |
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