Lewis & Short

ūnĭmănus, a, um, adj. [unus-manus] having only one hand, one-handed.

  1. I. In gen.: puer natus, Liv. 35, 21, 3; 41, 21, 12
  2. II. Unimanus, the surname of a certain Claudius. Flor. 2, 17, 16.