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Origin and history of acre

acre(n.)

Old English æcer "tilled field, open land," from Proto-Germanic *akraz "field, pasture" (source also of Old Norse akr, Old Saxon akkar, Old Frisian ekker, Middle Dutch acker, Dutch akker, Old High German achar, German acker, Gothic akrs "field"), from PIE root *agro- "field."

"[O]riginally 'open country, untenanted land, forest'; ... then, with advance in the agricultural state, pasture land, tilled land, an enclosed or defined piece of land" [OED]. In English at first without reference to dimension; in late Old English the amount of land a yoke of oxen could plow in a day, afterward defined by statute 13c. and later as a piece 40 poles by 4, or an equivalent shape [OED cites 5 Edw. I, 31 Edw. III, 24 Hen. VIII]. The older sense is retained in God's acre "churchyard."

The Germanic word was adopted early in Old French and Medieval Latin, hence the Modern English spelling, which by normal development would be *aker (compare baker from Old English bæcere).

Entries linking to acre

Middle English akorn, from Old English æcern "nut, mast of trees, acorn," a common Germanic word (cognates: Old Norse akarn, Dutch aker, Low German ecker "acorn," German Ecker, Gothic akran "fruit"), originally the mast of any forest tree. It is by most sources said to be related to Proto-Germanic *akraz, the source of Old English æcer "open land," Gothic akrs "field," Old French aigrun "fruits and vegetables" (from Frankish or some other Germanic source), perhaps on the notion of "fruit of the open or unenclosed land;" see acre.

The sense was gradually restricted in Low German, Scandinavian, and English to the most important of the forest produce for feeding swine: the mast of the oak tree. The regular modern form would be *akern; the current spelling emerged 15c.-16c. by folk etymology association with oak (Old English ac) and corn (n.1), neither of which has anything to do with it. Acorn squash is attested by 1937.

"number of acres in a tract of land," 1795, from acre + -age.

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Trends of acre

adapted from books.google.com/ngrams/ with a 7-year moving average; ngrams are probably unreliable.

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