coction

noun3

1. •
   (no longer used) An act of boiling.
2. •
   (no longer used) Digestion.
3. •
   (no longer used, historical) The change which the humoralists believed morbific matter undergoes before elimination.

   • A yellow Urine is caused by a due Concoction of the Chyle with the Blood. A red Urine is made by the Mixture of Blood with it, or by a greater Coction. — 1697