Ectoderm

[ektәudә:m]

(noun.) the outer germ layer that develops into skin and nervous tissue.

编辑:维姬--From WordNet

(n.) The outer layer of the blastoderm; epiblast.

(n.) The external skin or outer layer of an animal or plant, this being formed in an animal from the epiblast. See Illust. of Blastoderm.

凯思琳校对

n. the external germinal layer of the embryo.

校对:罗尼