Rectum

rek′tum, n. the lowest part of the large intestine:— pl. Rec′ta .— adj. Rec′tal .— ns. Rec′to scope , a speculum for rectal examination; Rectot′omy , the operation for dividing a rectal stricture.— adjs. Rec′to-urē′thral , pertaining to the rectum and to the urethra; Rec′to-ū′terine , to the rectum and the uterus; Rec′to-vag′inal , to the rectum and the vagina; Rec′to-ves′ical , to the rectum and the bladder. [L. rectus , straight.]