| CGM | central gray matter |
|---|---|
| MIS | management information system; medical information service; meiosis-inducing substance; minimally in... |
| PAG | Peri-Aqueductal Gray |
| GM | gastric mucosa; Geiger-Muller [counter]; general medicine; genetic manipulation; geometric mean; gia... |
| GPS | Goodpasture syndrome; gray platelet syndrome; guinea pig serum; guinea pig spleen |