| MC & S | microscopy, culture, and sensitivity |
|---|---|
| MS | Maffuci syndrome; maladjustment score; mandibular series; Marfan syndrome; Marie-Strumpell [syndrome... |
| OS | left eye [Lat. oculus sinister]; occipitosacral; occupational safety; office surgery; Omenn syndrome... |
| PSR | pain sensitivity range; perspective surface rendering; portal systemic resistance; proliferative sic... |
| RWS | radiology work station; ragweed sensitivity |