/ˈdərməˌtōm/
Noun, pl. Dermatomes
1. The lateral wall of each somite in a vertebrate embryo, giving rise to the connective tissue of the skin. (Google Dictionary)
2. An area of the skin supplied by nerves from a single spinal root. (Google Dictionary)
3. The cutis plate. (wiktionary.org)
4. An instrument used surgically to remove a thin slice of skin for grafting. (wiktionary.org)
Word origin: Greek derma = skin, tome = a cutting or division.