Lewis Short
rĕdemptūra (noun F) : redimo
* An undertaking of public deliverings by contract, a contracting, farming (very rare): qui redempturis auxissent patrimonia,Liv. 23, 48 fin.: redempturis faciendis,Dig. 14, 3, 5; cf. Becker, Antiq. 2, 1, p. 270, and 3, 2, p. 217.
Charlton T. Lewis, Charles Short, A Latin Dictionary