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Hecto or hecta is a decimal unit prefix in the metric system denoting a factor of one hundred.It was adopted as a multiplier in 1795, and comes from the Greek á¼ÎºÎ±ÏÏÎ½ hekaton, meaning hundred.Based on a proposal by Thomas Young, the prefix was often alternatively spelled hecato-in early 19th century sources. Its unit symbol as an SI prefix in the International System of Units (SI) is the lower case letter h.t was adopted as a multiplier in 1795, and comes from the Greek á¼ÎºÎ±ÏÏÎ½ hekaton, meaning hundred. Based on a proposal by Thomas Young, the prefix was often alternatively spelled hecato-in early 19th century sources.
Hecto-, deka-, deci-, and centi-are usually attached only to the metric system units gram, meter, and liter. Owing to the force of tradition, one noncoherent unit, the liter, equal to 10 â3 m 3, or 1 dm 3, is generally accepted for use with SI. The internationally accepted abbreviation for liter is the letter l; however, this can be confused with the numeral 1, especially in typescript.