Entry 1 sense Webster, 1913 Sinupalliate · Si·nu·pal·li·ate · IPA /ˌsaɪn(j)ʊˈpæli.eɪt/ 01 a. Having a pallial sinus. See under Sinus. 1. Having a pallial sinus. See under Sinus.(Zool.) See: Sinus