Answer: ectoderm

AnswerCrossword Clue
ECTODERMOutermost cell layer
ECTODERMOuter membrane.
ECTODERMOuter skin layer.
ECTODERMOuter germ layer
ECTODERMOuter membrane of a jellyfish
ECTODERMOuter germ layer that develops into skin
ectodermthe outer germ layer in the embryo of a metazoan
ectodermthe external layer of an embryo, also EPIBLAST, EXODERM