to find out by strict examination
• (v. t.) To fish out; to find out by skill or laborious investigation; to search out.
Ex·pis'cate transitive verb [ Latin expiscatus , past participle of expiscari to fish out; ex out+ piscari to fish, piscis fish.] To fish out; to find out by skill or laborious investigation; to search out. 'To expiscate principles.' [ R.] Nichol. �...
to find out by thorough and detailed investigation; discover through scrupulous examination.