M

Alphabetical index

A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z

mega

Prefix for a multiple of 1 000 000, symbol: M.

metre

Unit of measurement of length, symbol: m.

(To avoid ambiguity, avoid using “m” to denote “mile” or “millions”.)

micro

Prefix for a subdivision of 0.000 001 or 1/1 000 000, symbol µ.

milli

Prefix for a subdivision of 0.001 or 1/1000, symbol: m.

minute (plane angle)

Unit of measurement of plane angle, non-SI but accepted for use with SI, symbol: ′.

minute (time)

Unit of measurement of time, non-SI but accepted for use with SI, symbol: min.

mole

Unit of measurement of substance, symbol: mol.