Lewis & Short

sătisdătĭo (or separately, sătis dă-tĭo), ōnis, f. [satis-do; v. satis, II. C.].

  1. I. The satisfaction of a creditor, Dig. 46, 3, 49.
  2. II. A giving of bail or security, Dig. 2, 8, 1; 4, 6, 28; 46, 5, 1; 50, 16, 61; Cic. Att. 5, 1, 2; Gai. Inst. 1, 200.
    Transf.: capitalis, i. e. a pledging of or answering with one’s life, Plin. 36, 5, 4, § 29.