| URD | unspecified respiratory disease; upper respiratory disease |
|---|---|
| URI | uniform resource identifier; upper respiratory illness; upper respiratory infection |
| LPD | Luteal Phase Defect |
| AP | accessory pathway; accounts payable; acid phosphatase; acinar parenchyma; action potential; active p... |
| APP | acute phase protein; alum-precipitated pyridine; aminopyrazolopyrimidine; amyloid peptide precursor;... |