proc·to·de·um
also proc·to·dae·um (prŏk′tə-dē′əm)n. pl. proc·to·de·a (-dē′ə) or
proc·to·de·ums also
proc·to·dae·a (-dē′ə) or
proc·to·dae·ums An inward fold on the surface of the embryonic ectoderm that develops into part of the anal passage.
[New Latin prōctodeum : Greek prōktos, anus + New Latin -odeum (probably from Greek hodaion, neuter of hodaios, on the way, from hodos, way).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
proctodeum
(ˌprɒktəʊˈdiːəm) or proctodaeum
n,
pl -dea (
-dɪə)
(Anatomy) the ectodermal, posterior part of the alimentary canal
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014