Acna
Acna or ACNUA (also spelt agna and agnua) was, according to Varro, the Italian name, but, according to Columella and Isidore, the common Baetican name of the actus quadratus. [ACTUS] An old writer, quoted by Salmasius, says agnua habet pedes XIIII. cccc,
i. e. 14,400 square feet. It is very doubtful whether the word is connected with the Greek ἄκαινα or ἄκενα, seeing that the measure is so very different, and that it is quite uncertain to what language acna belongs. (Varro, R. R. 1.10.2; Colum. . R. 5.1.5; Schneider, Comment. ad ll. cc.; Isidor. Orig. 15.15; Salmasius, ad Solin. p. 481.)
From William Smith (ed.), Dictionary of Greek and Roman Antiquities. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.