bowel

Universal Words noun 1 [C,usually pl.] one of a system of tubes below the stomach in which solid waste collects before it is passed out of the body: (medical) to empty / move / open your bowels (= to pass solid waste out of the body) * bowel cancer / cancer of the bowel 2 (the bowels of sth) [pl.] (literary) the part that is deepest inside sth: A rumble came from the bowels of the earth (= deep underground).