[ prok-tuh-dee-uh m ]
/ ˌprɒk təˈdi əm /

noun, plural proc·to·de·a [prok-tuh-dee-uh] /ˌprɒk təˈdi ə/, proc·to·de·ums. Embryology.

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 forms

proc·to·de·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for proctodeum


n. pl. proc•to•de•ums

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.