| LS | lateral suspensor; left sacrum; left septum; left side; legally separated; leiomyosarcoma; length of... |
|---|---|
| LSD | laryngeal sound discrimination; least significant difference; least significant digit; low-sodium di... |
| MESNA | [sodium 2-]mercaptoethanesulfonate |
| MPSS | methylprednisolone sodium succinate; Music Performance Stress Study |
| Na | Avogadro number; sodium [Lat. natrium] |