| Abbreviations | Meaning |
 | PM | Pectoralis Major [muscle] |
| OMD | Ocular Muscle Dystrophy; Oculomandibulodyscephaly; Orbital Maxillary Disjunction; Organic Mental Disorder; Oromandibular Dystonia |
| MR | Medial Rectus [muscle] |
| DMC | Demeclocycline; Di(p-chlorophenyl) Methylcarbinol; Direct Microscopic Count; Duration Of Muscle Contraction; Dyggve-Melchior-Clausen [syndrome] |
| ECM | Embryonic Chick Muscle |
| MEB | Medical Evaluation Board; Muscle-eye-brain [disease] |
| QMT | Quantitative Muscle Test |
| MRO | Master Reference Oscillator; Medical Review Officer; Minimal Recognizable Odor; Muscle Receptor Organ |
| FDI | First Dorsal Interosseus (muscle Of The Hand) |
| IMT | Indomethacin; Induced Muscular Tension; Inspiratory Muscle Training; Intimal Mean Thickness |
| EMS | Electrical Muscle Stimulation |
| MFT | Multifocal Atrial Tachycardia; Muscle Function Test |
| LLD | Left Lateral Decubitus [muscle]; Leg Length Discrepancy; Limb Length Discrepancy; Lipid-lowering Drug; Long-lasting Depolarization |
| N&M | Nerves And Muscles; Night And Morning |
| SMHC | Smooth Muscle Heavy Chain Myosin |
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