ectoderm ectodactylism • ectodermal · · · Info · Definitions · Synonyms · Characters · · ectoderm · · Text Latin · · Script 8 · · Length Definitions · · · (noun) the outer germ layer that develops into skin and nervous tissue. Synonyms: exoderm, ectoblast. · · Noun Definition 1 Synonyms · · · exoderm · · Synonym 1 ectoblast · · Synonym 2 Characters · · c latin small letter c U+0063 d latin small letter d U+0064 e latin small letter e U+0065 m latin small letter m U+006D o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074