a combining form meaning “anus,” “rectum,” used in the formation of compound words: proctoscope.
Also especially before a vowel, proct-.
Origin of procto-
< Greek prōkto-, combining form of prōktós
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
before a vowel proct-
indicating the anus or rectumproctology
Word Origin for procto-
from Greek prōktos
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Anus or rectum:proctalgia.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.