Milli-

Short description: SI prefix denoting 10 to the -3rd power

"Milli" redirects here. For other uses, see Milli (disambiguation).

Milli (symbol m) is a unit prefix in the metric system denoting a factor of one thousandth (10−3).[1] Proposed in 1793,[2] and adopted in 1795, the prefix comes from the Latin mille, meaning one thousand (the Latin plural is milia). Since 1960, the prefix is part of the International System of Units (SI).

## See also

* RKM code

## References

1. ↑ A. Thompson; B. N. Taylor (2009-07-02). "Special Publication 811: NIST Guide to the SI, Chapter 4: The Two Classes of SI Units and the SI Prefixes". NIST (Physical Measurement Laboratory). https://www.nist.gov/pml/special-publication-811/nist-guide-si-chapter-4-two-classes-si-units-and-si-prefixes. Retrieved 2020-05-14.
2. ↑ Commission temporaire de Poids & Mesures rêpublicaines, En exécution des Décrets de la Convention Nationale (1793) (in fr). Instruction abrégée sur les mesures déduites de la grandeur de la Terre; uniformes pour toute la Rêpublique, et sur les Calculs relatifs à leur division décimale (Edition originale ed.). Paris, France: De l´imprimerie nationale exécutive du Louvre. https://archive.org/details/instructionabreg00hauy. Retrieved 2015-10-09.

SI prefixesv * d * e

Prefix  | Base 10  | Decimal | English word  | Adoption[nb 1]

|
|
|
|

Name  | Symbol  | Short scale | Long scale
yotta | Y  |  1024 | 1000000000000000000000000 |  septillion  |  quadrillion  | 1991
zetta | Z  |  1021 | 1000000000000000000000 |  sextillion  |  trilliard  | 1991
exa | E  |  1018 | 1000000000000000000 |  quintillion  |  trillion  | 1975
peta | P  |  1015 | 1000000000000000 |  quadrillion  |  billiard  | 1975
tera | T  |  1012 | 1000000000000 |  trillion  |  billion  | 1960
giga | G  |  109 | 1000000000 |  billion  |  milliard  | 1960
mega | M  |  106 | 1000000 |  million  | 1873
kilo | k  |  103 | 1000 |  thousand  | 1795
hecto | h  |  102 | 100  |  hundred  | 1795
deca | da  |  101 | 10  |  ten  | 1795
|  100 | 1  |  one  | –
deci | d  |  10−1 | 0.1  |  tenth  | 1795
centi | c  |  10−2 | 0.01  |  hundredth  | 1795
milli | m  |  10−3 | 0.001  |  thousandth  | 1795
micro | μ  |  10−6 | 0.000001 |  millionth  | 1873
nano | n  |  10−9 | 0.000000001 |  billionth  |  milliardth  | 1960
pico | p  |  10−12 | 0.000000000001 |  trillionth  |  billionth  | 1960
femto | f  |  10−15 | 0.000000000000001 |  quadrillionth  |  billiardth  | 1964
atto | a  |  10−18 | 0.000000000000000001 |  quintillionth  |  trillionth  | 1964
zepto | z  |  10−21 | 0.000000000000000000001 |  sextillionth  |  trilliardth  | 1991
yocto | y  |  10−24 | 0.000000000000000000000001 |  septillionth  |  quadrillionth  | 1991

1. ↑ Prefixes adopted before 1960 already existed before SI. 1873 was the introduction of the CGS system.

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