WordReference Random House Unabridged Dictionary of American English © 2026
proc•to  (prok′tō),USA pronunciation n., pl. -tos. [Informal.]
  1. Biochemistry, Medicine, Informal Termsproctosigmoidoscopy.
  • by shortening

procto-, 
  1. a combining form meaning "anus,'' "rectum,'' used in the formation of compound words:proctoscope.
Also,[esp. before a vowel,] proct-. 
  • Greek prōkto-, combining form of prōktós

'procto' also found in these entries (note: many are not synonyms or translations):
Ectoprocta - proctoclysis - proctology - proctor - proctoscope - proctoscopy - proctosigmoidoscope - proctosigmoidoscopy - subproctorial

Forum discussions with the word(s) "procto" in the title:


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