D
- D-wolves – Guardians of the Sareer on Arrakis in the time of Leto Atreides II; ferocious wolves descended from Gaze Hounds and ordinary wolves, "noted for their keen eyesight."
- Damper, Ixian – Portable device which hides words from anyone without the proper coded translator, and projects distortions that hide the precise movements of lips and the sounds of voices. It is described as a "black disc" buoyed midair by suspensors.
- Deathstill – Fremen device used to extract all moisture from a living or dead human or creature. This is traditionally done to reclaim precious water from the dead, who no longer require it; but in Children of Dune the device is used as a method of execution.
- Distrans – Steganographic device producing a "temporary neural imprint on the nervous system of Chiroptera (bats) or birds. The creature's normal cry then carries the message imprint, which can be sorted from that carrier wave by another distrans."
Read more about this topic: Glossary Of Dune Terminology