uncĭālis

I. of or belonging to a twelfth part, amounting to a twelfth part: asses, Plin. 33, 3, 13, § 45; so, uva, id. 14, 3, 4, § 42: altitudo, id. 18, 16, 43, § 146; so, litterae, Hier. prol. in Job fin.