Of, pertaining to, or of the nature of, a ferment or fermentation.
1650. Sir T. Browne, Pseud. Ep., II. vii. 783. Cucumbers … may also debiliate the vital acidity, and fermentall faculty of the stomack.
1676. Newton, in Rigaud, Corr. Sci. Men (1841), II. 389. The frame of nature may be nothing but ether condensed by a fermental principle.
1694. Westmacott, Scripture Herbal (1695), 152. Intense cold … prevents their Fruit-bearing by suspending the fermental action of the Principles.
