Webster’s Revised Unabridged Dictionary · 1913
Expiscate
Ex·pis′cate (ĕks·pĭs′kāt), v. t. [L. expiscatus, p. p. 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.
Dr. Burton has with much ingenuity endeavored to expiscate the truth which may be involved in them. W. L. Alexander.