Lewis & Short

dextĕrĭtas, ātis, f. [dexter, II.].

  1. I. Dexterity, aptness, readiness in doing good offices (rare and not ante-Aug.): tanta inerat comitas Scipioni atque ad omnia naturalis ingenii dexteritas, Liv. 28, 18, 6; 37, 7, 15; Gell. 13, 16, 1 al.
  2. * II. Prosperity, felicity, Arn. 7, p. 225.