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单词 gastrula
释义 gastrula Embryol.|ˈgæstrələ|
[mod.L. dim., f. Gr. γαστρ-, γαστήρ stomach.]
That form of the metazoic germ which consists of a cup with two layers of cells in the wall.
1877Huxley Anat. Inv. Anim. iii. 115 A gastrula is formed by invagination of the morula, the ectoderm of which has the structure of the endoderm of the adult.1886H. Spencer in 19th Cent. May 764 The two-layered ‘gastrula’ —the simplest ancestral form of the Metazoa.
attrib.1878Bell Gegenbauer's Comp. Anat. 111 This condition is simplest in the Gastrula form.1880Gentl. Mag. CCXLVI. 43 The opening which formerly led into the gastrula-body.1880Huxley Crayfish iv. 211 This is the gastrula condition of the embryo.1887A. C. Haddon Introd. Embryology ii. 24 The normal method of gastrula-formation.
Hence ˈgastrular a., pertaining to a gastrula or to gastrulation.
In recent Dicts.
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