| AAPA | American Academy of Physician Assistants; American Association of Pathologist Assistants |
|---|---|
| Pa | pascal; pathologist, pathology; protactinium; Pseudomonas aeruginosa; pulmonary arterial [pressure] |
| APHIS | Animal and Plant Health Inspection Service |
| NCPPB | National Collection of Plant Pathogenic Bacteria |
| PE | Edinburgh Pharmacopoeia; pancreatic extract; paper electrophoresis; partial epilepsy; pelvic examina... |