| PEL | peritoneal exudate lymphocyte; permissible exposure limit |
|---|---|
| PEM | pediatric emergency medicine; peritoneal exudate macrophage; polymorphic epithelial mucin; prescript... |
| HARD | hydrocephalus-agyria-retinal dysplasia [syndrome] |
| HARD | +/- E hydrocephalus-agyria-retinal dysplasia plus or minus encephalocele [syndrome] |
| HF | Hageman factor; haplotype frequency; hard filled [capsule]; hay fever; head of fetus; head forward; ... |