sphincteroscope

sphinc·ter·o·scope

(sfingk'tĕr-ō-skōp'), A speculum to facilitate inspection of the internal sphincter ani muscle. [sphincter + G. skopeō, to view]

sphincteroscope

S14-880120 (sfĭngk′tĕr-ō-skōp″) [″ + skopein, to examine] An instrument for inspection of the anal sphincter.