meaning of fermentation
1. The process of undergoing an effervescent change, as by the action of yeast; in a wider sense (Physiol. Chem. ), the transformation of an organic substance into new compounds by the action of a ferment, either formed or unorganized. It differs in kind according to the nature of the ferment which causes it.
2. A state of agitation or excitement, as of the intellect or the feelings.
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