| HDP | hexose diphosphate; high-density polyethylene; hydrogen diphosphonate; hydroxydimethylpyrimidine |
|---|---|
| HFDA | high film density area |
| IOD | injured on duty; integrated optical density; interorbital distance |
| LID | large intraluminal density; late immunoglobulin deficiency; lymphocytic infiltrative disease |
| LS-BMD | lumbar spine bone mineral density |