hectare /ˈhɛktɛː , -ɑː/ (abbrev.: ha)
▸ noun a metric unit of square measure, equal to 100 ares (2.471 acres or 10,000 square metres).
– DERIVATIVES hectarage /ˈhɛktərɪdʒ/ noun
– ORIGIN early 19th cent.: from French, formed irregularly from Greek hekaton ‘hundred’ + are2.