hypoblast hypobenthos • hypoblastic · · · Info · Definitions · Synonyms · Characters · · hypoblast · · Text Latin · · Script 9 · · Length Definitions · · · (noun) the inner germ layer that develops into the lining of the digestive and respiratory systems. Synonyms: endoderm, entoderm, endoblast, entoblast. · · Noun Definition 1 Synonyms · · · endoderm · · Synonym 1 entoderm · · Synonym 2 endoblast · · Synonym 3 entoblast · · Synonym 4 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 h latin small letter h U+0068 l latin small letter l U+006C o latin small letter o U+006F p latin small letter p U+0070 s latin small letter s U+0073 t latin small letter t U+0074 y latin small letter y U+0079