| IOD | injured on duty; integrated optical density; interorbital distance |
|---|---|
| LD | labor and delivery; laboratory data; labyrinthine defect; lactate dehydrogenase; laser Doppler; lear... |
| LDL | loudness discomfort level; low density lipoprotein |
| LDLA | low-density lipoprotein apheresis |
| LDLC | low-density lipoprotein cholesterol |