Lengua inglesa
1 a substance that causes fermentation, such as a bacterium, yeast or mould.
2 fermentation.
3 a state of agitation or excitement.
verb (fermented , fermenting )
1 tr & intr to undergo or make something undergo fermentation.
2 to be or put in a state of excitement or instability.
[15c: from Latin fermentum yeast, from fervere to boil]
fermentability noun .
fermentable adjective .
fermented adjective .

© Hodder Education
noun , chem a biochemical process in which micro-organisms such as bacteria, yeasts, moulds or enzymes break down an organic compound, usually a carbohydrate, in the absence of oxygen, eg the conversion of sugar into alcohol.
fermentative adjective .

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