From Lateinisch-Deutsch FreeDict-Wörterbuch ver. 1.0.3: culus /kˈʊlʊs/ (culi /kˈʊlɪ/ <gen>) <n, sg, m> Hintern
culus /kˈʊlʊs/ (culi /kˈʊlɪ/ <gen>) <n, sg, m> Hintern