| Acronym | Definition |
|---|
| MCL | Maximum Contaminant Level |
| MCL | Medial Collateral Ligament |
| MCL | Mantle Cell Lymphoma |
| MCL | Marine Corps League |
| MCL | Mono Class Library |
| MCL | Microsoft Compatibility Labs |
| MCL | Movement for Canadian Literacy |
| MCL | Micro Code Level |
| MCL | Multiedit Macro Library |
| MCL | Multimedia Manager Collection File |
| MCL | Microliter |
| MCL | Modern and Classical Languages |
| MCL | Multnomah County Library (Portland, OR) |
| MCL | Magna Cum Laude |
| MCL | Maximum Concentration Limit |
| MCL | Maximum Concentration Level |
| MCL | Medical Center Laboratory (various locations) |
| MCL | Markov Clustering (algorithm) |
| MCL | Monteverde Coservation League (Monteverde, Costa Rica) |
| MCL | Maximum Containment Level (EPA) |
| MCL | Mid-Clavicular Line |
| MCL | Much Clown Love |
| MCL | Munitions Control List |
| MCL | Moore Corporation Limited (publicly traded company) |
| MCL | Minimum Coupling Loss (mobile communications systems) |
| MCL | Mid-Canada Line |
| MCL | Mono Class Library (computing) |
| MCL | Method Calibration Limit |
| MCL | Materials Characterization Lab |
| MCL | Monterey College of Law (California) |
| MCL | Master Capability List (US DoD's capability-based planning process component) |
| MCL | Microstrip Coupled Line |
| MCL | Mission Critical Leadership |
| MCL | Music City Legend Drum and Bugle Corps (Nashville, TN) |
| MCL | Mobilization Cross-Leveling |
| MCL | Master Configuration List |
| MCL | Master of Civil Law |
| MCL | Metropolitan Corporation of Lahore (Pakistan) |
| MCL | Mercury Communications Ltd. |
| MCL | Metro Canada Logistics |
| MCL | Mobile Communications Laboratory |
| MCL | Multi Column List |
| MCL | Mixing Condensation Level (meteorology) |
| MCL | Mission Configured Loads |
| MCL | Media Communications Lab |
| MCL | Moscow Chemical Lyceum |
| MCL | Maximum Clearance Level |
| MCL | Multiple Cutaneous Leiomyoma |
| MCL | Master Change Log |
| MCL | Modified Chest Left (arm) |
| MCL | Marquess College, London (UK) |
| MCL | Motor Current Limiting |
| MCL | Mine Clearance Launcher |
| MCL | Maximum Container Level |
| MCL | Minimum Clear Length |
| MCL | Moto Club Luxembourg (French: Luxembourg Motorcycle Club; Luxembourg) |
| MCL | Maintenance Capability Level |
| MCL | Master Calibration List |
| MCL | McLaughner's Cafeterias (restaurant chain) |