Any process that stops, prevents or reduces the frequency, rate or extent of endodermal cell differentiation.
Synonyms:
exact_synonym:
down regulation of endoderm cell differentiation; down regulation of endodermal cell differentiation; downregulation of endoderm cell differentiation; downregulation of endodermal cell differentiation; negative regulation of endoderm cell differentiation
narrow_synonym:
inhibition of endoderm cell differentiation; inhibition of endodermal cell differentiation