\Cas"u*ist\, n. [L. casus fall, case; cf. F. casuiste.
See {Casual}.]
One who is skilled in, or given to, casuistry.

      The judment of any casuist or learned divine concerning
      the state of a man's soul, is not sufficient to give
      him confidence.                          --South.

\Cas"u*ist\, v. i.
To play the casuist. --Milton.