YEASTS

noun

1. An often humid, yellowish froth produced by fermenting malt worts, and used to brew beer, leaven bread, and also used in certain medicines.
2. A single-celled fungus of a wide variety of taxonomic families.
3. A frothy foam.

verb

1. To ferment.
2. (of something prepared with a yeasted dough) To rise.
3. To exaggerate