Definition of "top fermentation" []

• An alcoholic fermentation during which the yeast cells are carried to the top of the fermenting liquid. It proceeds with some violence and requires a temperature of 14-30° C. (58-86° F.). It is used in the production of ale, porter, etc., and of wines high in alcohol, and in distilling.

Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)