digester

noun3

1. •
   One who, or that which, digests.
2. •
   A vessel for converting materials, especially plant and animal matter, into materials more suitable for subsequent use or further processing, using solvents, especially water; relatively low heat; enyzymes; bacteria, etc..
3. •
   (old-fashioned) A medicine or food that aids digestion, or strengthens digestive power.

   • Rue is [...] a great Digester and Restorer of Appetite; [...] — 1700