immunohistopathologically UK /ˌɪmjuːnəʊˌhɪstəʊˌpæθəˈlɒdʒɪkəli/US /ˌɪmjuːnoʊˌhɪstoʊˌpæθəˈlɒdʒɪkəli/ adverb1 •In terms of immunohistopathology.