| MCAO | middle cerebral artery occlusion |
|---|---|
| MCAS | middle cerebral artery syndrome |
| MCAT | medical college admission test; middle cerebral artery thrombosis |
| MHA | major histocompatibility antigen; May-Hegglin anomaly; Mental Health Association; methemalbumin; mic... |
| MHV | magnetic heart vector; middle hepatic vein; mouse hepatitis virus |