One entry found for ectoderm.

Main Entry: ec·to·derm
Pronunciation: ek-t-drm
Function: noun
1 : the outer layer of cells of a two-layered animal (as a jellyfish)
2 : the outermost of the three basic layers of an embryo from which skin, nerves, and certain other structures develop
- ec·to·der·mal /ek-t-dr-ml/ adjective