Subst.: nōna, ae, f. (Sc. hora.) The ninth hour of the day, i. e. the third before sunset, at which hour business was ended at Rome: post nonam venies, Hor. Ep. 1, 7, 71; Mart. 4, 8, 5.
(Sc. pars.) The ninth part: nonas praedae vovere, Just. 20, 3, 3.—Hence, adv.: nōnō, ninthly, Cassiod. de Anim. 12.