digester

noun

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. A biodigester.
4. (dated)A medicine or food that aids digestion, or strengthens digestive power.

   “Rue is [...] a great Digeſter and Reſtorer of Appetite; [...]”