Lewis & Short

mannŭlus, i, m. dim. [1. mannus], a Gallic pony (post-Aug.), Plin. Ep. 4, 2, 3; Mart. 12, 24, 8. ††

    1. 1. mannus, i, m. [Celtic], a kind of small Gallic horse, a coach-horse, cob (used esp. for pleasure-drives): agens mannos, Lucr. 3, 1063: si per obliquum similis sagittae (serpens) Terruit mannos, Hor. C. 3, 27, 6; id. Ep. 1, 7, 77: rapientibus esseda mannis, Ov. Am. 2, 16, 49: detonsi, with shorn manes, Prop. 4 (5), 8, 15: obesi manni, Sen. Ep. 87, 9.
      2. ††
    2. 2. Mannus, i, m. [Germ. Mann, ἄνθρωπος], a god of the ancient Germans, son of Tuisco, Tac. G. 2.