One of various single - celled fungi that form masses of tiny round or oval cells by budding. When placed in a
sugar solution the cells multiply and convert the
sugar into alcohol and
carbon dioxide. Yeasts are used as fermenting agents in baking, brewing, and the making of wine and spirits Alcoholic drink made from
water and malt (fermented barley or other grain), flavoured with hops. Beer contains between 1 % and 6 % alcohol. One of the oldest alcoholic drinks, it was brewed in ancient China, Egypt, and Babylon.
brewer's yeast a yeast used in brewing and as a source of vitamin
yeast is a viscous substance consisting of a growth of fungous cells developed in contact with saccharine liquids and producing alcoholic fermentation by means of enzymes, used in brewing, distilling etc.
yeast plan any of several single - celled fungi that produce alcoholic fermentation in saccharine liquids.
The medieval distinction between beer (containing hops) and ale (without hops) has now fallen into disuse and beer has come to be used strictly as a generic term including ale, stout, and lager. Stout is top fermented, but is sweet and strongly flavoured with roasted grain ; lager is a
light beer , bottom fermented and matured over a longer period.