xylostyptic UK /ˌzaɪ.ləʊˈstɪp.tɪk/US /ˌzaɪ.loʊˈstɪp.tɪk/ adjective1 •(no longer used) Applied to a substance with styptic and hemostatic properties, made by dissolving tannic acid in a mixture of alcohol, ether, and collodion.