i Register
In some senses, digester is marked as dated. Watch for register when choosing this word.
noun
One who, or that which, digests.
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..
A biodigester.
A medicine or food that aids digestion, or strengthens digestive power.
Rue is [...] a great Digeſter and Reſtorer of Appetite; [...]