I.a little brother.
I. Lit.: unde fit, ut malim fraterculus esse Gigantis, i. e. of unknown parents. qs. sprung from the earth, Juv. 4, 98. —
II. Transf. (acc. to frater, II. A.), a familiar appellation given to a friend: “quam copiose laudatur Apronius a Timarchide ... Volo, mi frater, fraterculo tuo credas,” Cic. Verr. 2, 3, 66, § 155.