外胚层

【医】 animal-germ layer; dermal layer; ectoblast; ectoderm; epiblast
neurodermal layer

1.epiblast  2.exoderm  3.ectoblast  4.epiblasticectoderm  

外的英语翻译：

besides; in addition; not closely related; other; outer; outside; unofficial
【医】 ec-; ecto-; exo-; extra-; xeno-

胚层的英语翻译：

【医】 blastoderm; blastodermic layer; blastodisk; blastophyllum
emioryonic plate; germ layer; germ-disc; germ-layer; germinal disc
germinal layer; germinal membranes; membrana germinativa