nōnus, a, um, adj. ord. [for novenus, from novem],
I the ninth : terra nona, Cic. Rep. 6, 18, 18: accedes opera agro nona Sabino, Hor. S. 2, 7, 118.—
II Subst.: nōna , ae, f.
A (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.—
B (Sc. pars.) The ninth part : nonas praedae vovere, Just. 20, 3, 3.—Hence, adv.: nōnō , ninthly , Cassiod. de Anim. 12.