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


anorectal:
rectalgia:
rectitis:
rectoabdominal:
rectoanal:
rectocolitis:
rectocolonic:
rectocystotomy:
rectopexy:
rectophobia:
rectoplasty:
rectorrhagia:
rectorrhagy:
rectoscope:
rectoscopy:
rectotomy:
rectum:
rectus: