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Dictionary and Thesaurus entries for:

metre

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metre [n]
 
1)the basic unit of length adopted under the Systeme International d'Unites (approximately 1.094 yards)
    Synonyms :m meter 
    See Also: metric_linear_unit  dam  decimeter 
 
2)(prosody) the accent in a metrical foot of verse
    Synonyms :beat cadence measure meter 
    See Also: poetic_rhythm  metrics  catalexis  scansion  common_measure  foot 
 
3)rhythm as given by division into parts of equal time
    Synonyms :meter time 
    See Also: rhythmicity 
 

From The Free On-line Dictionary of Computing: (http://www.foldoc.org/, Editor Denis Howe)

(US "meter") The fundamental SI unit of length.

From 1889 to 1960, the metre was defined to be the distance between two scratches in a platinum-iridium bar kept in the vault beside the Standard Kilogram at the International Bureau of Weights and Measures near Paris.

This replaced an earlier definition as 10^-7 times the distance between the North Pole and the Equator along a meridian through Paris; unfortunately, this had been based on an inexact value of the circumference of the Earth.

From 1960 to 1984 it was defined to be 1650763.73 wavelengths of the orange-red line of krypton-86 propagating in a vacuum.

It is now defined as the length of the path traveled by light in a vacuum in the time interval of 1/299,792,458 of a second.

(1998-02-07)



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