| Abbreviation | Definition |
|---|---|
| MCTU | Michigan Council of Trout Unlimited |
| MCTV | Morris County Teen Voices |
| MCU | Marine Corps University |
| MCUF | Marine Corps University Foundation |
| MCWC | Macomb County Warming Center |
| MCWC | Michigan Citizens for Water Conservation |
| MCY | Master's Commission for Youth |
| MCYM | Military Community Youth Ministries |
| MDA | Muscular Dystrophy Association |
| MDAC | Mental Disability Advocacy Center |
| MDAF | Maryland Dietetic Association Foundation |
| MDAI | Multicultural Dyslexia Awareness Initiative |
| MDAP | Mental Disability Advocacy Program |
| MDBA | Manitoba Deaf Blind Association |
| MDBA | Missouri Deaf Blind Association |
| MDBA | Monolithic Dome Builders Association |
| MDBDF | March Of Dimes Birth Defects Foundation |
| MDD | Membership Development Director |
| MDF | Management for Development Foundation |
| MDF | Marketing Development Fund |