(chemistry) Abbreviation of monomethylhydrazine.

(astronomy) Abbreviation of millimagnitude.

(aviation) Initialism of Master minimum equipment list.

Initialism of molar mass distribution. / Initialism of mass median diameter. / Initialism of murder mystery dinner.

Initialism of Movement for Multi-Party Democracy: a Zambian political party / Initialism of MikuMikuDance. A freeware animation tool for creating dancing cartoons.

(Philippines) Initialism of Metropolitan Manila Development Authority.

Elongated form of mhm.

plural of Mrs

Master of Mathematics degree.

plural of MMEL