A / ăcus
noun

ăcus

gen. ăcĕris · gender neuter · decl. 3rd
(also, , , v. 1. acus, III.) [kindred with acus, ūs, Goth.
ahana; agn; Agana
ahana, old Norse agn, old Germ. Agana], = ἄχυρον, the husk of grain and of pulse; chaff, Cato, R. R. 54, 2; Varr. R. R. 1, 52; 57; 3, 9, 8.