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Acra (mensura)
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Acra,[1] sive ager,[2] est superficiei mensura, quae 4840 virgas quadratas vel 43 560 pedes quadratos continet. Etiamnunc circiter in 4047 metra quadrata aequat.
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Vide etiam paginas discretivas: Acra (discretiva) et Ager (discretiva).
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Nomen Latinum acra a linguis Germanicis deducta est,[3] sed eiusdem radicis Indoeuropaeae est atque ager, sincera vox Latina. Primum acra fuit mensura, quam iugum boum uno die arare posset (confer iugerum).[4]