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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). Since 1960, the prefix is part of the International System of Units (SI).
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 ]
A unit prefix is a specifier or mnemonic that is added to the beginning of a unit of measurement to indicate multiples or ... hecto, kilo vs. deci, centi, milli. [26]
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.
Prefix name N/A 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: ...
The following table lists the names of small numbers used in the long and short scales, along with the power of 10, engineering notation, and International System of Units (SI) symbols and prefixes. [1] [page needed] [2] [page needed] [3] [page needed] [4] [5] [6] [7]
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The prefix kilo, for example, implies a factor of 1000 (10 3), and the prefix milli implies a factor of 1/1000 (10-3). Thus, a kilometre is a thousand metres, and a milligram is one thousandth of a gram.