Deci-
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Deci-

Deci- (symbol d) is a decimal unit prefix in the metric system denoting a factor of one tenth. Proposed in 1793[1] and adopted in 1795, the prefix comes from the Latin decimus, meaning "tenth". Since 1960, the prefix is part of the International System of Units (SI).[2][3] Its most frequent use, however, is in a non-SI unit, the decibel, used to measure sound intensity (relative to a reference) and many other ratios.

Deciliter or dl is common in recipes. Many European homes have a deciliter measure for flour, water etc.

Example:

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 ?  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.

References

  1. ^ Commission temporaire de Poids & Mesures rêpublicaines, En exécution des Décrets de la Convention Nationale (1793). 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 (in French) (Edition originale ed.). Paris, France: De l´imprimerie nationale exécutive du Louvre. Retrieved .
  2. ^ The International System of Units (Si): The Metric System. p. 30.
  3. ^ https://www.bipm.org/en/CGPM/db/11/12/
  4. ^ http://www.nikon.com/about/feelnikon/universcale/index_f.htm

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

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