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• procto
  procto

  noun

  proctosigmoidoscopy.
• procto-
  procto-

  a combining form meaning “anus,” “rectum,” used in the formation of compound words.

procto

¹ American  

[prok-toh] / ˈprɒk toʊ /

noun

Informal.

plural

proctos

1. proctosigmoidoscopy.

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procto- ² American  

especially before a vowel, proct-.

1. a combining form meaning “anus,” “rectum,” used in the formation of compound words.

   proctoscope.

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procto- British  

combining form

1. indicating the anus or rectum

   proctology

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Usage

What does procto- mean? Procto- is a combining form used like a prefix meaning “anus” or “rectum,” technical terms for parts of the butt. It is used in some medical terms, especially in pathology and surgery. Procto- comes from the Greek prōktós, meaning “anus.”What are variants of procto-?When combined with words or word elements that begin with a vowel, procto- becomes proct-, as in proctalgia.

Etymology

Origin of procto¹

By shortening

Origin of procto-²

< Greek prōkto-, combining form of prōktós