| HCS | Hajdu-Cheney syndrome; Hazard Communication Standard; health care support; hourglass contraction of ... |
|---|---|
| HHA | health hazard appraisal; hereditary hemolytic anemia; home health agency; home health aid; hypothala... |
| HHE | health hazard evaluation; hemiconvulsion-hemiplegia-epilepsy [syndrome] |
| HEIR | health effects of ionizing radiation; high-energy ionizing radiation |
| RO | radiation oncology; radiation output; ratio of; relative odds; renal osteodystrophy; reverse osmosis... |