Yeast Definition
yēst
noun
Any of various unicellular fungi of the genus Saccharomyces, especially S. cerevisiae, reproducing asexually by budding or sexually through the production of ascospores and capable of fermenting carbohydrates.
American Heritage Medicine
Any of various single-celled fungi in which little or no mycelium develops and which ordinarily reproduce by budding: they ferment sugars to form alcohol and carbon dioxide.
Webster's New World
Webster's New World
Froth consisting of yeast cells together with the carbon dioxide they produce in the process of fermentation, present in or added to fruit juices and other substances in the production of alcoholic beverages.
American Heritage Medicine
The yellowish, moist mass of yeast plants occurring as a froth on fermenting solutions.
Webster's New World
verb
To froth or ferment.
Webster's New World
(of something prepared with a yeasted dough) To rise.
Wiktionary
(African American Vernacular, slang) To exaggerate.
Wiktionary
Other Word Forms of Yeast
Noun
Singular:
yeastPlural:
yeastsOrigin of Yeast
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From Old English ġiest, from Proto-Germanic *jestuz. Compare Dutch gist, Swedish jäst.
From Wiktionary
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Middle English yeest from Old English gist yes- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
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