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countable and uncountable, plural yeasts
An often humid, yellowish froth produced by fermenting malt worts, and used to brew beer, leaven bread, and also used in certain medicines. examples
A single-celled fungus of a wide variety of taxonomic families. quotations
A microscopical examination of the yeast taken from these rapid vigorous fermentations will only be able to give useful conclusions in one respect.
1903, Alfred Peter Carlslund Jørgensen (R. Grey, translator), Practical Management of Pure Yeast: The Application and Examination of Brewery, Distillery, and Wine, Yeasts, The Brewing trade review, page 17
A true yeast or budding yeast in order Saccharomycetales.
baker's yeast, Saccharomyces cerevisiae
A compressed cake or dried granules of this substance used for mixing with flour to make bread dough rise. examples
brewer's yeast, certain species of Saccharomyces, principally Saccharomyces cerevisiae and Saccharomyces carlsbergensis. examples
Candida, a ubiquitous fungus that can cause various kinds of infections in humans.
The resulting infection, candidiasis. examples
(figuratively) A frothy foam. quotations examples
But what most puzzled and confounded you was a long, limber, portentous, black mass of something hovering in the centre of the picture over three blue, dim, perpendicular lines floating in a nameless yeast.
1851 November 14, Herman Melville, Moby-Dick; or, The Whale, 1st American edition, New York, N.Y.: Harper & Brothers; London: Richard Bentley
third-person singular simple present yeasts, present participle yeasting, simple past and past participle yeasted
To ferment. examples
(of something prepared with a yeasted dough) To rise. examples
(African-American Vernacular, slang) To exaggerate.