meden agan! (Gr.), [let there be] nothing in excess!
Mediolanum (L.), Milan.
medio tutissimus ibis (L.), thou wilt go safest in the middle.
mega biblion, mega kakon (Gr.), big book, great evil.
me judice (L.), I being judge, in my opinion.
mélange (Fr.), a mixture: coffee with milk.
mêlée (Fr.), a confused scuffle: a hot debate.
memento mori (L.), remember that you must die.
memorabilia (L.), things to be remembered.
mens sana in corpore sano (L.), a sound mind in a sound body.