hectare

[hek-tair]
noun
a unit of surface, or land, measure equal to 100 ares, or 10,000 square meters: equivalent to 2.471 acres. Abbreviation: ha
Also, hektare.


Origin:
1800–10; < French; see hect-, are2

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World English Dictionary
hectare (ˈhɛktɑː)
 
n
ha one hundred ares. 1 hectare is equivalent to 10 000 square metres or 2.471 acres
 
[C19: from French; see hecto-, are²]

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Etymonline
Word Origin & History

hectare
1810, from Fr. hectare "a hundred ares," formed from Gk. hekaton "hundred" (see hecatomb) + L. area "vacant piece of ground." A superficial measure containing 100 ares, coined by decree of the French National Convention in 1795.
Online Etymology Dictionary, © 2010 Douglas Harper
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Encyclopedia Britannica
Encyclopedia

hectare

unit of area in the metric system equal to 100 ares, or 10,000 square metres, and the equivalent of 2.471 acres in the British Imperial System and the United States Customary measure. The term is derived from the Latin area and from hect, an irregular contraction of the Greek word for hundred. Although the are is the primary metric unit of land measurement, in practice the hectare is more commonly used. The hectare is, by subsequent definition, equal to a djerib in Turkey, a jerib in Iran, a gong qing in mainland China, a manzana in Argentina, and a bunder in The Netherlands.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
Nonirrigated areas average one to two metric tons a hectare.
Yield-tonnes per hectare, bushels per acre or whatever-is the traditional gauge of agriculture's performance.
These have squeezed more and more food out of each hectare of land.
Potato production continues to rise as both the land area devoted to potato production and yield per hectare increase.
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