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trophectoderm
trophectoderm n. 
/trɒˈfɛktədəːm/,
Brit. /trə(ʊ)ˈfɛktədəːm/
, /trə(ʊ)ˈfɛktədəːm//trɒˈfɛktədəːm/U.S. /troʊˈfɛktəˌdərm/
trophoblast, esp. when forming the outermost layer of the blastocyst./troʊˈfɛktəˌdərm/ΘΚΠ
the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > embryo parts > [noun] > trophoblast
trophoblast1889
plasmoditrophoblast1905
trophectoderm1915
syncytiotrophoblast1926
1915 C. W. Prentiss Lab. Man. & Text-bk. Embryol. ii. 36 The inner cell mass is overgrown by an outer layer which we term the troph-ectoderm because, in mammals, it supplies nutriment to the embryo from the uterine wall.
1964 Science 17 Apr. 266/1 Blastocoel formation involves the differentiation of the trophectoderm.
2006 C. Nüsslein-Volhard Coming Life viii. 113 The cells of the lower layer spread to cover the inside wall of the trophectoderm, which corresponds to the yolk sac of the chicken egg.
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