Dictionary
mM
millimole; millimoles.
mm
millimeter; millimeters.
MM.
Messieurs.
mm.
1. Music.measures.
2. thousands.
3. millimeter; millimeters.
M.M.
1. Master Mason.
2. Master Mechanic.
3. Master of Music.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.