| LA | lactic acid; large amount; laser angioplasty; late abortion; late antigen; latex agglutination; left... |
|---|---|
| RAR | rapidly adapting receptor; rat insulin receptor; retinoic acid receptor; right arm reclining; right ... |
| LUSB | left upper scapular border; left upper sternal border |
| UE | uncertain etiology; under elbow; uninvolved epidermis; upper esophagus; upper extremity |
| URI | uniform resource identifier; upper respiratory illness; upper respiratory infection |