endoderm endocystitis • endodermal · · · Info · Definitions · Synonyms · Characters · · endoderm · · Text Latin · · Script 8 · · Length Definitions · · · (noun) the inner germ layer that develops into the lining of the digestive and respiratory systems. Synonyms: entoderm, endoblast, entoblast, hypoblast. · · Noun Definition 1 Synonyms · · · entoderm · · Synonym 1 endoblast · · Synonym 2 entoblast · · Synonym 3 hypoblast · · Synonym 4 Characters · · d latin small letter d U+0064 e latin small letter e U+0065 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072