noun
- Plural of proctodaeum; the posterior section of the alimentary canal in arthropods and some other invertebrates, derived from the ectoderm.
Usage: zoology; technical; also spelled proctodeum
Examples
- The proctodaeums of insects are lined with a chitinous cuticle.
- In arthropod anatomy, the proctodaeums connect the midgut to the anus.
- Researchers examined the proctodaeums of several beetle species under the microscope.
- The proctodaeums differ from the midgut in their embryological origin.