There are multiple definitions:

1. midaxillary line(English)

   • ECG
   • Electrophysiology

2. muscle activation level(English)

   • MVC, EMG
   • Musculoskeletal system, Electrophysiology
   • https://doi.org…1007/BF00964129
   • http://hardcarv…nceControl6.pdf

3. median arcuate ligament(English)

   • MALS, PDA
   • Anatomy
   • https://doi.org…asurg.2016.0002

4. methyl-aminolaevulinate(English)

   • involved as treatment modality for actinic keratosis
   • AK, dPDT, PDT
   • Ophthalmology, Nano-sciences, Therapeutic approaches
   • https://doi.org….1111/jdv.15185

5. mid-anterolateral(English)

   • ApL, ApS, BAL, BIS, EF, GLS, MIS, ROI, STE
   • Anatomy, Cardiology, Medical imaging
   • https://doi.org…0246-018-1847-2