ECTODERM Scrabble 13 Words With Friends 15 Scrabble letter values: E1C3T1O1D2E1R1M3 = 13 Definition noun the outer germ layer that develops into skin and nervous tissue. — synonyms: exoderm, ectoblast See all 141 words you can make from ECTODERM → 8-letter words Words starting with E Words ending with M ← Unscramble different letters