Fermentation /(fẽr`mĕn*tā"shŭn)/

Fer·men·ta·tion

Fermentation

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