M (disambiguation)

M stands for:

M (lowercase m ), the letter of the Latin alphabet
a letter of the Greek alphabet, see My (lowercase μ )
a letter of the Cyrillic alphabet, see М (lowercase м )
the sound represented by the three letters mentioned, see Voiced bilabial nasal
the currency of the German Empire from 1871, see Mark (1871) (also Mk or ℳ)
the currency of the GDR, see Mark (DDR)
the postcode area Manchester (as a single first letter of a postcode), see postcode (United Kingdom)
an art museum in Leuven (Belgium), see M - Museum Leuven
the rank of major (abbreviation of the Bundeswehr in lists)

Film and Music:

M (1931) , also M - A city is looking for a murderer, feature film by Fritz Lang
M (1951) , feature film by Joseph Losey
a miniseries by David Schalko (2019), see M - A city seeks a murderer (TV series)
in the 007 films the head of the British secret service MI6, see characters from James Bond films #M
a band project by British singer and music producer Robin Scott
as a pseudonym -M- the French rock musician Matthieu Chedid
Stage name of the South Korean singer Lee Min-woo
the middle finger of the plucked hand when fingering for guitar

Printing and press:

the magazine M - people make media
a photo manipulation as a mark [M] in the reference of photos

the color magenta, mostly for printing inks for inkjet printers, see magenta (color)

Roman inscriptions and texts:

the numeral for 1000, see Roman numeral

Medicine (often also M. ):

the abbreviation for muscle or muscle, see muscles
the abbreviation for Morbus ( illness ) in connection with the name of the first person describing it

System of units SI:

Mega , the million times (as SI prefix), see prefixes for units of measure

Natural Sciences:

occasionally the unit of measurement mol / liter when specifying molar concentrations , but this usage is out of date and does not conform to the SI
as a symbol the molar mass

Mathematics:

as a formula symbol often general for quantity (mathematics) ${\ displaystyle M}$
as a symbol for Mersenne numbers, see Mersenne prime number ${\ displaystyle M}$

Physics:

as symbols , the magnetization ${\ displaystyle M}$
as a symbol (or ) the Mach number ${\ displaystyle M}$ ${\ displaystyle Ma}$
as a formula symbol the mass number ${\ displaystyle M}$
Symbols as the torque ${\ displaystyle {\ vec {M}}}$
the obsolete unit Maxwell, see Maxwell (unit)

Chemistry:

Mesomeric effect
a stereo descriptor (short for "minus") to differentiate between configurational isomeric compounds, see descriptor (chemistry) # (P) -, (M) -
as a unit symbol for the substance concentration in mol / L (no standard-compliant use)

Biology:

the amino acid methionine as a one-letter code

Technology and cartography:

a metric ISO thread
the machine zero point in the machine coordinate system of machine tools
the friction factor in the friction factor model that is used when the softer friction partner is sheared off
several series of standards for electrical connectors that are screwed with metric threads
the indication of the scale on technical drawings, plans and maps; see scale (ratio)

Aerospace:

the letter reproduced in the spelling alphabet by Mike, Martha or Marie, see spelling table
a series of Japanese rocket types (also in the abbreviation Mu ), see Mu (rocket)
Isle of Man aircraft citizenship mark
* Abbreviation for Economy Class transport class on air travel

Astronomy:

as a unit symbol the absolute brightness ${\ displaystyle ^ {M}}$
an entry in the Messier catalog of astronomical objects
a spectral class of stars
Mars in astronomical nomenclature

Nautical:

one nautical mile as an abbreviation according to the INT standard

IT:

a Microsoft programming language, see M (Microsoft programming language)
often another programming language as MUMPS referred

Numismatics (coinage):

Madrid since 1591 on Spanish coins and since 1728 as a crowned M.
Milan on Austrian coins between 1770 and 1780 and on Italian coins until 1878
Mallorca (also PM or diamond)
Melbourne on English sovereigns from 1871 to 1931 and on Australian coins
Mexico (usually with a lowercase o) to this day
Toulouse on French coins from 1540 to 1837

M as a distinguishing mark on license plates:

international: Malta
Belgium: motorcycles
Bulgaria: Montana Oblast
Germany: independent city of Munich and district of Munich
Estonia: Tallinn and Harjumaa
Great Britain: Manchester
Montserrat Island

Croatia: foreign mission (yellow lettering on light blue background)

(Arabic: ﻡ) Lebanon: Beirut Governorate

Madagascar: Mahajanga Province

Montenegro: foreign mission

Netherlands: motorcycles

Philippines: Region 12 (also: Soccsksargen)

Portugal: Madeira (truck trailers and export vehicles)

Switzerland: Military (black license plate with white letters)

Slovakia: Dealer registration (white registration with red letters: last letter)

Slovenia: Embassy staff without diplomatic status

Spain: Community of Madrid (to be discontinued)

Czech Republic: Olomouc Region (Olomoucký kraj)

Hungary: agricultural vehicles

m stands for:

System of units SI:

Milli , one thousandth (as SI prefix), see prefixes for units of measurement
the unit of measurement is the meter

Physics:

as a symbol the mass, see mass (physics) ${\ displaystyle m}$
as the magnetic quantum number which the angular momentum quantum number (z. B. belongs , , ) ${\ displaystyle m_ {x}}$ ${\ displaystyle x}$ ${\ displaystyle m_ {l}}$ ${\ displaystyle m_ {s}}$ ${\ displaystyle m_ {j}}$

as a symbol the effective mass ${\ displaystyle m *}$
the magnetic moment as a symbol ${\ displaystyle {\ vec {m}}}$

Chemistry:

meta , a substitution pattern for aromatics

Technology:

Micronorm as a symbol , see ISO 9175

Astronomy:

the apparent brightness as a symbol ${\ displaystyle ^ {m}}$

See also: