There are multiple definitions:
algebraic multigrid(English)
- a preconditioner
- GMG
acoustic myography(English)
- an objective, noninvasive method which can be used for assessing a muscle condition in Parkinson's patients
- PD, UPDRS
- Parkinson, Myocyte / muscle, Ultrasound
- https://doi.org…4814/phy2.15631