Pertaining to any of numerous edible yeasts that produce, e.g., ale, and whose respective fermenting actions appear to be at the top surface of the wort.

(brewing) A slow alcoholic fermentation process carried out at low temperatures during which the yeast sinks to the bottom of the liquid. Used in brewing lager-type beers.

A device, used mainly in homebrewing, that allows carbon dioxide to escape from a fermenter without allowing air to enter

(brewing) Alcoholic fermentation during which the yeast cells are carried to the top of the fermenting liquid.

plural of bottom fermentation

plural of fermentation lock

plural of secondary fermentation

Third-person singular simple present indicative form of re-ferment

present participle of re-ferment

simple past tense and past participle of re-ferment