buttock http://homosaurus.org/v2/buttocks http://purl.obolibrary.org/obo/NCIT_C89806 http://purl.obolibrary.org/obo/UBERON_0013691 http://purl.org/sig/ont/fma/fma25245 A zone of soft tissue located on the posterior of the lateral side of the pelvic region corresponding to the gluteal muscles. Either of the fleshy mounds in the rear pelvic area of the human body formed by the gluteal muscles. buttocks set of buttocks limb region The Complete Dictionary of Sexology