Word:

Metre

Me´tre   Pronunciation: mē´tẽr
n.1.See Meter.
Noun1.Metremetre - the basic unit of length adopted under the Systeme International d'Unites (approximately 1.094 yards)
Synonyms: m, meter
2.metre - (prosody) the accent in a metrical foot of verse
Synonyms: cadence, meter, measure, beat
3.metre - rhythm as given by division into parts of equal time
Synonyms: meter, time
(unit)metre - (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.
dam, decameter, decametre, decimeter, decimetre, dekameter, dekametre, dkm, dm, m, meter, metric linear unit
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-- Metre --
Metre or meter
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