MF
# MF

MF or mf may refer to:

## Biology

* Mossy fiber (disambiguation), in neuroscience
* Mycosis fungoides, a type of skin disease
* Myelofibrosis, a chronic clonal malignant disease
* Microfibril rosettes, the sites of cellulose microfibril synthesis in plants

## Companies and organizations

* MF Dow Jones News, an Italian financial news agency
* MF Milano Finanza, an Italian business newspaper
* MF Global (also Man Financial), a former finance company NYSE listed as MF
* MF Norwegian School of Theology
* Massey Ferguson, an agricultural equipment company
* Methuselah Foundation, a non-profit volunteer organization devoted to anti-aging research
* Micro Focus, a software company
* Mitsubishi Fuso Truck and Bus Corporation, a Japanese manufacturer of trucks and buses
   * Mitsubishi Fuso Truck of America, Inc., a North American subsidiary
* Mladá fronta DNES, a Czech newspaper
* Musical Fidelity, a British high-end audio equipment manufacturer
* Xiamen Airlines (IATA airline designator MF)
* Muslims of France, a religious organization in France

## Computing

* MF and .mf, the country code and Internet top level domain for Saint Martin
* Mainframe computer
* MediaFire, a file hosting, file synchronization, and cloud storage service
* Metafont, a font-definition programming language
* Mozilla Firefox, a web browser
* Multi-frequency, in telephony

## Entertainment

### Music

* Mezzo forte (musical notation), a dynamic marking
* Maynard Ferguson (1928–2006), trumpeter and bandleader
* Melodifestivalen, the Swedish preselection for the Eurovision Song Contest
* MF Doom (Daniel Dumile, born 1974), British-born hip hop recording artist
* MF Grimm (born 1970), hip-hop artist
* Mylène Farmer (born 1961), Canadian-born French singer and songwriter

### Television

* Making Fiends (TV series), an American animated horror comedy
* Modern Family, an American sitcom
* Monster Force, a 1994 animated television series
* "Murder Family", the 2020 premiere episode of Helluva Boss

### Video games

* Metroid Fusion

## Other uses

* M/F, a novel by Anthony Burgess
* M/F (journal), British feminist journal
* MF or M/F, ship prefix for a motor ferry
* Megafarad (MF), an SI unit of electric capacitance
* Millifarad (mF), an SI unit of electric capacitance
* The prefix for steel-wheel rolling stock on the Paris Métro
* Mandatory frequency airport, a non-towered airport that requires aircraft to communicate on a published frequency
* Manual focus
* Master of forestry
* Mayotte, France (FIPS PUB 10-4 territory code MF)
* Medium format (film), a size of camera
* Medium frequency, radio transmissions between the frequencies of 300 kHz and 3000 kHz
* Membership function, in control engineering, in fuzzy sets
* Midfielder, a playing position in association football
* Milk fat, on dairy product labels in Canada
* Motherfucker, an insult
* Mutual fund, in finance
* Member of the Folketing
