Medical Term:

yeast

Pronunciation: yēst

Definition: A general term denoting true fungi of the family Saccharomycetaceae that are widely distributed in substrates that contain sugars (such as fruits), and in soil, animal excreta, the vegetative parts of plants, etc. Because of their ability to ferment carbohydrates, some yeasts are important to the brewing and baking industries.

[A.S. gyst]

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