Akademik

MM.
Messieurs.

* * *

mm. or mm (no period),
1. millimeter or millimeters.
2. thousands (Latin, millia).
mm.2 or mm2 (no period),
square millimeter.
mm.3 or mm3 (no period),
cubic millimeter.
MM.,
1. (Their) Majesties.
2. Messieurs.
Usage See Messrs. for usage note.
M.M.,
Master of Music.

Useful english dictionary. 2012.