exoderm

Century Dictionary and Cyclopedia

1. n. Same as epidermis.
2. n. Same as ectoderm.
3. n. The external crust of the body of an insect.

Wiktionary

1. n. An outer layer of skin.
2. n. The outermost layer of cells in a developing embryo.

WordNet 3.0

1. n. the outer germ layer that develops into skin and nervous tissue