I.a father's brother, paternal uncle (opp. avunculus, a mother's brother, maternal uncle); cf. Dig. 38, 10, 10.
I. Lit.: “L. Cicero patruus,” Cic. de Or. 2, 1, 2: “tutor et patruus,” Cic. Verr. 2, 1, 53, § 139; Hor. S. 1, 6, 131: “patruus magnus = frater avi,” Dig. 38, 10, 10: “patruus major = frater proavi,” Tac. A. 12, 22; Dig. 38, 10, 10: major patruus = avi et aviae patruus, Paul. ex Fest. p. 136 Müll.: “patruus maximus = frater abavi,” id. ib. Fragm. 17 ; plur., Juv. 1, 158; 6, 567.—
II. Transf., a severe reprover (as uncles are apt to co towards their nephews): “pertristis quidam patruus, censor, magister,” Cic. Cael. 11, 25: “ne sis patruus mihi,” Hor. S. 2, 3, 88: “cum sapimus patruos,” Pers. 1, 11; Manil. 5, 449.