buttock, haunch, hindquarters (vertebrate animals)
Latin word, found 18 times in the texts on Socratos.
Horace, Sermones 1.2.89: quod pulcrae clunes, breve quod caput, ardua cervix.
Juvenal, Saturae 1.2.21: clunem agitant, ego te ceventem, Sexte, verebor?
All forms of clunis