MCL
- 1150
- MCL Cafeterias
- MCL1
- Macintosh Common Lisp
- Mahanadi Coalfields Limited
- Malabar Cements Limited
- Maltese Challenge League
- Mantle cell lymphoma
- Marine Corps League
- Mast cell leukemia
- Maximum contaminant level
- McLaughlin group (mathematics)
- Medial collateral ligament
- Medical Center Leeuwarden
- Michigan Compiled Laws
- Microlitre
- Mid-Canada Line
- Midclavicular line
- Minecraft Legends
- Monte Carlo localization
- Movement for Christian Liberation
- Mucocutaneous leishmaniasis
- Multicollinearity
- Multiple cutaneous leiomyoma
- Mysore Cements Limited