[prok-tuh-dee-uh m]
noun, plural proc·to·de·a [prok-tuh-dee-uh] /ˌprɒk təˈdi ə/, proc·to·de·ums. Embryology.
  1. a depression in the ectoderm of the anal region of a young embryo, which develops into part of the anal canal.

Origin of proctodeum

1875–80; < New Latin < Greek prōkt- proct- + New Latin -odeum < Greek hodaîon, neuter of hodaîos on or by the way; see -ode2, -eum
Related formsproc·to·de·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

proctodeal in Medicine


  1. Of or relating to the proctodeum.


n. pl. proc•to•de•ums
  1. An inward fold on the surface of the embryonic ectoderm that develops into part of the anal passage.anal pit
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.