| LAR | laryngology; late asthmatic response; late reaction; left arm recumbent; leukocyte antigen-related |
|---|---|
| LRD | living related donor |
| LRDT | living related donor transplant |
| MM | macromolecule; Maelzels metronome; major medical [insurance]; malignant melanoma; manubrium to malle... |
| NACHRI | National Association of Children's Hospitals and Related Institutions |