# Meter

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'''[[Metre]]''' (or '''[[meter]]'''), symbol '''[[m]]''', is the base unit of length in the International System of Units (SI). Originally intended to be one ten-millionth of the distance from the Earth's equator to the '''[[North Pole]]''', its definition of has been periodically refined to reflect growing knowledge of '''[[metrology]]'''. Since 1983, it is defined as the distance travelled by light in a complete vacuum in '''1⁄299,792,458''' of a '''[[second]]'''. | '''[[Metre]]''' (or '''[[meter]]'''), symbol '''[[m]]''', is the base unit of length in the International System of Units (SI). Originally intended to be one ten-millionth of the distance from the Earth's equator to the '''[[North Pole]]''', its definition of has been periodically refined to reflect growing knowledge of '''[[metrology]]'''. Since 1983, it is defined as the distance travelled by light in a complete vacuum in '''1⁄299,792,458''' of a '''[[second]]'''. | ||

- | + | SI multiples | |

|symbol=m | |symbol=m | ||

|unit=metre | |unit=metre | ||

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|xM=[[megametre]] | |xM=[[megametre]] | ||

|xG=[[gigametre]] | |xG=[[gigametre]] | ||

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## Revision as of 17:44, 6 June 2010

**Metre** (or ** meter**), symbol

**m**, is the base unit of length in the International System of Units (SI). Originally intended to be one ten-millionth of the distance from the Earth's equator to the

**North Pole**, its definition of has been periodically refined to reflect growing knowledge of

**metrology**. Since 1983, it is defined as the distance travelled by light in a complete vacuum in

**1⁄299,792,458**of a

**second**.

SI multiples
|symbol=m
|unit=metre
|note=Common prefixed units are in **bold** face.
|n=|mc=|m=|c=|k=
|xd=decimetre
|xc=centimetre
|xmc=micrometre
|xf=femtometre
|xm=millimetre
|xn=nanometre
|xp=picometre
|xda=decametre
|xh=hectometre
|xk=kilometre
|xM=megametre
|xG=gigametre

Reference *Meter* [1]