| 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] |
| OccTh | occupational therapy, occupational therapist |
| OD | Doctor of Optometry; obtained absorbance; occipital dysplasia; occupational dermatitis; occupational... |