| D1 | diagonal one; first dorsal vertebra |
|---|---|
| D2 | diagonal two; second dorsal vertebra |
| D3-12 | third to twelfth dorsal vertebrae |
| DDD | AV universal [pacemaker]; defined daily dose; degenerative disc disease; dehydroxydinaphthyl disulfi... |
| DH | daily habits; day hospital; dehydrocholate; dehydrogenase; delayed hypersensitivity; dermatitis herp... |