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[hek-tair] /ˈhɛk tɛər/
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.
1800-10; < French; see hect-, are2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for hectares
  • Meanwhile, over the last century millions of hectares have been cleared of trees.
  • To grow enough wheat to feed themselves, they would need about two hectares.
British Dictionary definitions for hectares


one hundred ares. 1 hectare is equivalent to 10 000 square metres or 2.471 acres ha
Word Origin
C19: from French; see hecto-, are²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for hectares



1810, from French hectare "a hundred ares," formed from Greek hekaton "hundred" (see hecatomb) + Latin area "vacant piece of ground" (see area). 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 Article for hectares


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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