| Abbreviation | Definition |
|---|---|
| LWAA | Laboratory Waste Accumulation Area |
| LWGL | CSIRO Land and Water Griffith Laboratory |
| MA | Monophyletic Assemblage |
| mAB | Monoclonal AntiBody |
| MABL | Mobile Aquatic Barotrauma Laboratory |
| MAC | Minimum Alveolar Concentration |
| MACL | Mid America Clinical Laboratories |
| MACL | Modal Analysis and Controls Laboratory |
| MACS | Multi Aids Cohort Study |
| MACS | Multicenter Aids Cohort Study |
| MAD | Method Accuracy Description |
| MAD | Mitotic Arrest Deficient |
| MÆ | M-phage (Greek symbol) |
| MAI | Mycobaterium Avium Intercellure |
| MAIC | Major Analytical Instrumentation Center |
| MALDI-TOF | Matrix-Assisted Laser Desorption/Ionization Time-Of-Flight |
| MALII | Maackia amurensis II lectin |
| MALL | Mallard |
| MALT | mucosa-associated lymphoid tissue |
| MAML | Mechanics of Advanced Materials Laboratory |