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The prefixes deci-and centi-, and less frequently hecto-and deca-, are generally used for informal purposes; the centimetre (cm) is especially common. Some modern building codes require that the millimetre be used in preference to the centimetre, because "use of centimetres leads to extensive usage of decimal points and confusion". [ 10 ]
Using Greek for ascending and Latin for descending would be consistent with established prefixes such as deca, hecto, kilo vs. deci, centi, milli. [26] In 2001, a few unofficial prefixes appeared on the Internet: hepa (10 21), ento (10 −21), otta (10 24), fito (10 −24), nea (10 27), syto (10 −27), dea (10 30), tredo (10 −30), una (10 33 ...
deci centi milli micro nano pico femto atto zepto yocto ronto quecto; Prefix symbol d c m μ n p f a z y r q Factor 10 0: 10 −1: 10 −2: 10 −3: 10 −6: 10 −9: ...
Prefix Symbol Factor Power tera T 1 000 000 000 000: 10 12: giga G 1 000 000 000: 10 9: mega M 1 000 000: 10 6: kilo k 1 000: 10 3: hecto h 100 10 2: deca da 10 10 1 (none) (none) 1 10 0: deci d 0.1 10 −1 ...
Centi-(symbol c) is a unit prefix in the metric system denoting a factor of one hundredth. Proposed in 1793, [ 1 ] and adopted in 1795, the prefix comes from the Latin centum , meaning "hundred" ( cf. century, cent, percent, centennial).
Power of ten Engineering notation [citation needed]Short scale (U.S. and modern British) Long scale (continental Europe, archaic British, and India) SI prefix SI symbol
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).
For the hundreds, there are competing forms: Those in -gent-, from the original Latin, and those in -cent-, derived from centi-, etc. plus the prefixes for 1 through 9 . Many of the items in the following tables are not in general use, but may rather be regarded as coinages by individuals.