Lewis Short
(adjective) : subjŭgus, a, um, id. *
* That is attached to the yoke, yoked: molae machinariae subjugum aliquem dare,App. M. 7, p. 194, 29.
* Subjŭgum, i, n., the name of an unknown animal: eïdem auctores subjugum, quod nec quale esset animal, nec ubi nasceretur, tradiderunt,Plin. 30, 15, 52, § 146.
Charlton T. Lewis, Charles Short, A Latin Dictionary