recto-, rect-

(Latin: straight [intestine], direct, right; that is, "the part of the large intestine that ends at the anus")

anorectal
A reference to the anus and the rectum or to the junction between the two.
rectalgia
Pain at the anus or in the rectum.
rectitis
rectoabdominal (adjective) (not comparable:
Pertaining to the rectum and the abdomen: When Catherine was at her gynaecologist's, a rectoabdominal examination was performed requiring one hand to lie flat on the abdominal wall and a finger of the other hand inserted into the rectum.
rectoanal
rectocolitis
rectocolonic
rectocystotomy
rectoperineal
Relating to the rectum and perineum.
rectopexy
rectoplasty
rectorrhagia
rectorrhagy
rectoscope
1. An instrument for examining the rectum consisting of a tube or speculum equipped with a light.
2. A tool consisting of a thin tube with a light source, used to examine the inside of the rectum.
rectoscopy
Endoscopic examination of the rectum.

It is used to locate, identify, and photograph pathologic alterations, to obtain biopsy material, and to perform other surgical interventions, and for the delivery of medication.