| M | concentration measured by the number of moles of solute per liter of solvent |
|---|---|
| M | the 13th letter of the Roman alphabet |
| M | the cardinal number that is the product of 10 and 100 |
| M | the basic unit of length adopted under the System International d'Unites (approximately 1.094 yards) |
| M | denoting a quantity consisting of 1,000 items or units |
| M | a semiautomatic rifle |
| M | a semiautomatic rifle |
| M | German physiologist and histologist who in 1838 formulated the cell theory (1804-1881) |
| M | (music) the pace of music measured by the number of beats occurring in 60 seconds |
| M | a measure of the money supply |
| M | a measure of the money supply |
| M | a measure of the money supply |