Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An inward fold on the surface of the embryonic ectoderm that develops into part of the anal passage.

from The Century Dictionary.

  • noun See proctodæum.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The back ectodermal part of an alimentary canal.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin prōctodeum : Greek prōktos, anus + New Latin -odeum (probably from Greek hodaion, neuter of hodaios, on the way, from hodos, way).]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek πρωκτός with ὁδαῖος, of ὁδός.

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