- (n.) Spume or foam, of water.
- (n.) A form of fungus which grows as indvidual rounded cells, rather than in a mycelium, and reproduces by budding; especially members of the orders Endomycetales and Moniliales. Some fungi may grow both as a yeast or as a mycelium, depending on the conditions of growth.
- (n.) The foam or troth (top yeast) or the sediment (bottom yeast), of beer or other in fermentation, which contains the yeast plant or its spores, and under certain conditions produces fermentation in saccharine or farinaceous substances; a preparation used for raising dough for bread or cakes, and making it light and puffy; barm; ferment.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). yeast. Retrieved September 24, 2026, from http://smartdefine.org/yeast/definitions/2083116 |
| Chicago | Webster's. 2011. "yeast" http://smartdefine.org/yeast/definitions/2083116 (accessed September 24, 2026). |
| Harvard | Webster's 2011, yeast, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/yeast/definitions/2083116>. |
| MLA | Webster's. "yeast" 28 May 2011. Web. 24 September 2026. <http://smartdefine.org/yeast/definitions/2083116> |