01 n. The process of undergoing an effervescent change, as by the action of yeast;
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1.
The process of undergoing an effervescent change, as by the action of yeast;(Physiol. Chem.)
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2.
A state of agitation or excitement, as of the intellect or the feelings.“It puts the soul to fermentation and activity.” — Jer. Taylor.“A univesal fermentation of human thought and faith.” — C. Kingsley.