| CVO | central vein occlusion; central venous oxygen; Chief Veterinary Officer; credentialing verification ... |
|---|---|
| DNO | District Nursing Officer |
| DRO | differential reinforcement of other behavior; Disablement Resettlement Officer |
| FDO | Fleet Dental Officer |
| HO | hand orthosis; heterotopic ossification; high oxygen; hip orthosis; history of; Holt-Oram [syndrome]... |