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Etymology

acre

/ˈeɪkər/

noun

Origin

Proto-Indo-European

*agro- — field

Overview

Meaning Now

  • A unit of land area equal to 4,840 square yards (approximately 0.405 hectares).
  • An open field, pasture, or plot of land.

Literal older meaning

open country or field

Language path

Proto-Indo-European → Proto-Germanic → Old English → English

Earliest form

æcer

Earliest period

Old English period

Journey

Originally, an acre was not a defined geometric measurement but rather the amount of land that could be plowed in one day by a yoke of oxen. Over time, statutory definitions in medieval England standardized the size to its current measurement.

Evolution

  1. Proto-Indo-European

    *aǵro-

    “field or hunting ground”

  2. Proto-Germanic

    *akraz

    “field or cultivated land”

  3. Old English

    æcer

    “field, open land, or acre”

  4. Middle English

    acre

    “a measurement of land”

Connections

Word parts

acre

root

field

Related across languages

  • German

    Acker

    field

  • Latin

    ager

    field

  • Greek

    agros

    field

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External references use DefinedTerm semantics.