"meter" (meter), the basic unit of length in the international system of units, with the symbol m? [1-2] can be used to measure length, width and height.

The definition of "meter" originated in France. The length of 1 meter was originally defined as one ten thousandth of the distance from the equator of the earth to the north pole on the meridian passing through Paris, and then the international meter origin was determined. With the deepening of people's understanding of measurement, the definition of the length of meter has been revised several times.

From 1983, the length of meter is defined as "the distance that light travels in vacuum in 1/299 792 458 seconds".

1688, British philosopher and priest John Wilkins put forward the necessity of decimal standard length unit system.

1675, the Italian scientist Ti Tuo Livio Bratini first used the word metro cattolico in his paper, which originated from the Greek μ? τρον καθολικ? ν(métron katholikón), which means "universal unit of measurement".

1789 After the victory of the French Revolution, the National Assembly ordered the French Academy of Sciences to organize a committee, the unified measurement System. The Committee put forward a new metric system and suggested that one tenth of the distance from the equator to the North Pole on the meridian passing through Paris (that is, one fortieth of the meridian of the earth) be used as the standard unit. They called this unit mètre, which later evolved into meter, and the Chinese translation is "Mi Tu" or "meter". 179 1 year, which was approved by the French parliament. [4-7]? 1799 65438+February 10 France adopted the metric system and began to formally use it.