Lewis & Short

subjŭgus, a, um, adj. [sub-jugum]

  1. * I. That is attached to the yoke, yoked: molae machinariae subjugum aliquem dare, App. M. 7, p. 194, 29.
  2. II. 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.