名词
1. 酵母;酵母菌
Yeast is a kind of fungus which is used to make bread rise, and in making alcoholic drinks such as beer.
1. any of various single-celled fungi that reproduce asexually by budding or division
2. a commercial leavening agent containing yeast cells
used to raise the dough in making bread and for fermenting beer or whiskey
Synonym: barm