| Abbreviation | Definition |
|---|---|
| MCVC | Maltman Cosham Veterinary Clinic |
| MD | Mad Dog |
| MDBA | Masters of Draghounds and Bloodhounds Association |
| MDC | Milk Development Council |
| MDT | Motivational Dog Training |
| MDVMA | Maryland Veterinary Medical Association |
| ME | Metabolic Energy |
| MedARKS | Medical Animal Records Keeping System |
| MFHA | Masters of Fox Hounds Association |
| MFPH | Monroe Family Pet Hospital |
| MGAGB | Mounted Games Association of Great Britain |
| MHP | My House Pet |
| MHS | Meat Hygiene Service |
| MISMR | Michigan Society for Medical Research |
| MLC | Meat and Livestock Commission |
| MM | mare's milk |
| MMB | Milk Marketing Board |
| MMRG | Microchip Manufacturers and Retailers Group |
| MNVP | medically necessary veterinary product |
| MP | Mud Puppies |