yeast «yeest», noun verb.
1. the substance that causes dough for most kinds of bread to rise and that causes beer to ferment. Yeast consists of very small single-celled plants that grow quickly in a liquid containing sugar.
2. = yeast plant. (Cf.yeast plant)
3. = yeast cake. (Cf.yeast cake)
4. Figurative. an influence, element, or the like, that acts as a leaven.
5. foam; froth. SYNONYM(S): spume.
to ferment; be covered with froth.
[Old English gist]
yeast´like´, adjective.

Useful english dictionary. 2012.

Look at other dictionaries:

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