Lewis & Short

aestĭmātōrĭus, a, um, adj. [aestimator], regarding a valuer or taxer, only in the jurists: actio, Dig. 19, 3, 1; and absol.: aestĭmātōrĭa, ae, Dig. 21, 1, 43, § 6: aestimatorium judicium, ib. Fragm. 18 al.