gastrula
gastrula[ˈgastrʊlə](pl. gastrulae -liː)- (Embryology)an embryo at the stage following the blastula, when it is a hollow cup-shaped structure having three layers of cells
(胚)原肠胚
派生gastrulationnoun语源- late 19th cent.: modern Latin, from Greek gastēr, gastr- 'stomach' + the Latin diminutive ending -ula
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