fermentation

Etymology

From Middle English fermentacioun, from Latin fermentātiō, fermentātiōnem.

noun

  1. (biochemistry) Any of many anaerobic biochemical reactions in which an enzyme (or several enzymes produced by a microorganism) catalyses the conversion of one substance into another; especially the conversion (using yeast) of sugars to alcohol or acetic acid with the evolution of carbon dioxide
  2. A state of agitation or excitement; a ferment.

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