xylospongium UK /ˌzaɪləʊˈspʌnd͡ʒi.əm/US /ˌzaɪloʊˈspʌnd͡ʒi.əm/ noun1 •A Greek and Roman utensil consisting of a sea sponge fixed to the end of a wooden stick, typically thought to have been used for anal hygiene or as a toilet brush. formsxylospongia · xylospongiums