I. A little letter, Cic. Att. 6, 9, 1: “accepi tuam epistolam vacillantibus litterulis,” id. Fam. 16, 15, 2.—
II. Transf.: litterulae, ārum.
A. A short letter, a note: “hoc litterularum exaravi,” Cic. Att. 12, 1, 1.—
B. Grammatical knowledge, literary learning, liberal studies: “quem propter litterularum nescio quid libenter vidi,” Cic. Att. 7, 2, 8: “litterulae meae oblanguerunt,” id. Fam. 16, 10, 2; 5, 21, 2: “litterulis Graecis imbutus,” Hor. Ep. 2, 27.