Lewis & Short

tentāmentum, i, n. [tento], a trial, proof essay, attempt (poet. and in post-Aug. prose; usu. in plur.).

        1. (α) In plur.: mortalia Tentamenta, Ov. M. 15, 629: fide (i. e. fidei), id. ib. 7, 728: tui, Verg. A. 8, 144: civilium bellorum, Tac. H. 2, 38.
        2. (β) In sing.: tentamenti gratiā, Gell. 9, 15, 6: tentamento frustrati, Amm. 24, 2, 4 al.