Definition of yeast Yeast

/jiˈst/ - [yeest] - yeast

We found 15 definitions of yeast from 6 different sources.

What does yeast mean?

Noun Plural: yeast
yeast - any of various single-celled fungi that reproduce asexually by budding or division
		fungus an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia
		endomycetales, order endomycetales fungi having a zygote or a single cell developing directly into an ascus
		baker's yeast, saccharomyces cerevisiae, brewer's yeast used as a leaven in baking and brewing
yeast - a commercial leavening agent containing yeast cells; used to raise the dough in making bread and for fermenting beer or whiskey
		barm
		leaven, leavening an influence that works subtly to lighten or modify something; "his sermons benefited from a leavening of humor"
		yeast cake small cake of compressed moist yeast
		brewer's yeast yeast used in fermenting beer

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yeast (Noun)
An often humid, yellowish froth produced by fermenting malt worts, and used to brew beer, leaven bread, and also used in certain medicines.
yeast (Noun)
A type of single-celled fungus.
yeast (Noun)
A compressed cake or dried granules of this substance used for mixing with flour to make bread dough rise.
yeast (Noun)
A frothy foam.
yeast (Verb)
To ferment.
yeast (Verb)
To rise.
yeast (Verb)
To exaggerate.

yeast (n.)
The foam, or troth (top yeast), or the sediment (bottom yeast), of beer or other in fermentation, which contains the yeast plant or its spores, and under certain conditions produces fermentation in saccharine or farinaceous substances; a preparation used for raising dough for bread or cakes, and making it light and puffy; barm; ferment.
yeast (n.)
Spume, or foam, of water.
yeast (n.)
A form of fungus which grows as indvidual rounded cells, rather than in a mycelium, and reproduces by budding; esp. members of the orders Endomycetales and Moniliales. Some fungi may grow both as a yeast or as a mycelium, depending on the conditions of growth.

yeast
Many species of unicellular fungi, most of which belong to the Ascomycetes and reproduce by budding. The genus Saccharomyces is used in brewing and winemaking because in low oxygen concentration it produces zymase, an enzyme system that breaks down sugars to alcohol and carbon dioxide. Saccharomyces is also used in bread-making. Some yeasts are used as a source of protein and of vitamins of the B group.\n(Source: ALL)

Yeast are eucaryotic microorganisms. They are classified as fungi. There are about 1,500 different species of yeast. Most reproduce asexually, by budding. Some use binary fission to reproduce. This is also asexual reproduction.

A certain kind of yeast, Saccharomyces cerevisiae has been used for a very long time. It is used for baking bread, for example, or as an additive to help the fermentation of alcoholic drinks, such as beer. It is also considered to be a model organism for modern cell biology. Other yeasts can cause infections in humans (they are pathogens). Yeast has also been used to make electricity, or to make ethanol (as a biological fuel for cars).

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yeast in sign language