Lewis & Short

consanguĭnĭtas, ātis, f. [consanguineus], blood-relationship, consanguinity (rare; perh. not ante-Aug.).

  1. I. In a restricted sense, the relationship between brothers and sisters (mostly in the jurists), Dig. 38, 8, 4; 1, 7, 44.
  2. II. In a more extended sense, relationship, in gen., Liv. 7, 19, 6; 8, 5, 4; Verg. A. 2, 86.
        1. * b. Trop.: doctrinae, affinity, similarity, Tert. adv. Haeret. c. 32 fin.