The building blocks of English

Affixes

proct(o)-

Anus or rectum.

Greek prōktos, anus.

Proctology is the branch of medicine concerned with the anus and rectum; a proctoscope is a medical instrument with an integral lamp for examining the anus and lower part of the rectum or carrying out minor medical procedures; proctitis is inflammation of the rectum; proctalgia is neuralgic pain in it; proctectomy (Greek ektomē, excision) is its surgical removal.