bŭbulcus (noun M) : bos, bubulus, βοῦκος.
* In a restricted sense, one who ploughs with oxen, a ploughman, = arator (diff. from pastor and armentarius, a herdsman; so most freq. in the Script. rerr. rustt.),Varr. R. R. 2, prooem. § 4 sq.; Juv. 11, 151; cf. Col. 1, 6, 8; 1, 9, 2; 2, 2, 25; 2, 5, 2; 2, 12, 1 sq.; Cic. Div. 1, 27, 57; Ov. Tr. 3, 12, 30; Juv. 7, 116; 11, 151 al.
* In a more general sense, a herdsman (rare, and not before the post-Aug. per.), Dig. 33, 7, 18, § 6.

s. TLL