The process in which a relatively unspecialized cell acquires the specialized features of an endoderm cell, a cell of the inner of the three germ layers of the embryo. [ http://purl.obolibrary.org/obo/CL_0000223 GOC:yaf http://www.ncbi.nlm.nih.gov/pubmed/17624332 ]

Synonyms: endoderm cell differentiation