Lewis Short
indāgātor (noun M) : id.
* One who traces out, a tracker of prey, Isid. Orig. 10 fin.: apum,one who hunts swarms of bees,Col. 9, 8, 12: aquarum, a hunter of springs (= aquilex), id. 2, 2, 20.
* Transf., an investigator, searcher: celatūm (for celatorum),Plaut. Trin. 2, 1, 14: rerum naturalium, Ser. Samm. ap. Macr. S. 2, 12, 7; Vitr. 1, 6, 6.
Charlton T. Lewis, Charles Short, A Latin Dictionary