| massc | mass concentration |
|---|---|
| MC | mass casualties; mast cell; Master of Surgery [Lat. Magister Chirurgiae]; maximum concentration; Med... |
| MIKE | mass-analyzed ion kinetic energy |
| MM | macromolecule; Maelzels metronome; major medical [insurance]; malignant melanoma; manubrium to malle... |
| MMAD | mass median aerodynamic diameter |