There are multiple definitions:

1. dynamic diffusion network(English)

   • this initiative engages care providers in collaborative and iterative refinement of practices to promote rapid improvements in care for complex problems involving moral injury and that lack a codified evidence base
   • CCA, VHA
   • Injury, Ethics, Guidelines
   • https://doi.org…1037/scp0000297

2. disk displacement with nonreduction(English)

   • refers to the angulation between the condylar long axis and the transversal plane
   • DDR, MRI, nr
   • Medical imaging
   • https://doi.org…4.2001.11746174