sinupalliate /ˌsaɪn(j)ʊˈpæli.eɪt/adjective 1noun 1forms 3 adjective1 •In molluscs, having an indented pallial line or sinus.At the same time the posterior gape of the valves would lead one to expect a sinupalliate character. — 1895 noun1 •A mollusc with an indented pallial line or sinus. formssinupalliates · more sinupalliate · most sinupalliate
