(medicine) Initialism of morbidity and mortality.

Abbreviation of month-on-month: percentual change from same period one month earlier

A small milk chocolate candy piece with an artificially colored sugar coating, produced by Mars Incorporated.

plural of M&M

(rare) A gender-neutral honorific, comparable to Mx., used instead of Mr., Mrs., etc.

(organic chemistry) meta-

The ordinal number thirteenth, derived from this letter of the English alphabet, called em and written in the Latin script.

(usually clothing) Initialism of medium (of the manufactured size). / Initialism of mature.

Initialism of mother. / Initialism of male. / Initialism of men. (sign on toilet door) / Initialism of Monday. / Abbreviation of nautical mile. / Initialism of million.

(grammar) Abbreviation of masculine.