Deci-
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Look up deci- in Wiktionary, the free dictionary. |
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:
- A compact disc is about 12 centimeters or 1.2 decimeters.[4]
Prefix | Base 1000 | Base 10 | Decimal | English word | Adoption[nb 1] | ||
---|---|---|---|---|---|---|---|
Name | Symbol | Short scale | Long scale | ||||
yotta | Y | 10008 | 1024 | 1000000000000000000000000 | septillion | quadrillion | 1991 |
zetta | Z | 10007 | 1021 | 1000000000000000000000 | sextillion | trilliard | 1991 |
exa | E | 10006 | 1018 | 1000000000000000000 | quintillion | trillion | 1975 |
peta | P | 10005 | 1015 | 1000000000000000 | quadrillion | billiard | 1975 |
tera | T | 10004 | 1012 | 1000000000000 | trillion | billion | 1960 |
giga | G | 10003 | 109 | 1000000000 | billion | milliard | 1960 |
mega | M | 10002 | 106 | 1000000 | million | 1873 | |
kilo | k | 10001 | 103 | 1000 | thousand | 1795 | |
hecto | h | 10002/3 | 102 | 100 | hundred | 1795 | |
deca | da | 10001/3 | 101 | 10 | ten | 1795 | |
10000 | 100 | 1 | one | – | |||
deci | d | 1000−1/3 | 10−1 | 0.1 | tenth | 1795 | |
centi | c | 1000−2/3 | 10−2 | 0.01 | hundredth | 1795 | |
milli | m | 1000−1 | 10−3 | 0.001 | thousandth | 1795 | |
micro | μ | 1000−2 | 10−6 | 0.000001 | millionth | 1873 | |
nano | n | 1000−3 | 10−9 | 0.000000001 | billionth | milliardth | 1960 |
pico | p | 1000−4 | 10−12 | 0.000000000001 | trillionth | billionth | 1960 |
femto | f | 1000−5 | 10−15 | 0.000000000000001 | quadrillionth | billiardth | 1964 |
atto | a | 1000−6 | 10−18 | 0.000000000000000001 | quintillionth | trillionth | 1964 |
zepto | z | 1000−7 | 10−21 | 0.000000000000000000001 | sextillionth | trilliardth | 1991 |
yocto | y | 1000−8 | 10−24 | 0.000000000000000000000001 | septillionth | quadrillionth | 1991 |
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References[edit]
- ^ 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 2015-10-09.
- ^ The International System of Units (Si): The Metric System. p. 30.
- ^ https://www.bipm.org/en/CGPM/db/11/12/
- ^ http://www.nikon.com/about/feelnikon/universcale/index_f.htm