yeasts

/Y IY1 S T S/
noun
  1. 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. 2

    A single-celled fungus of a wide variety of taxonomic families.

  3. 3

    A frothy foam.

verb
  1. 1

    To ferment.

  2. 2

    (of something prepared with a yeasted dough) To rise.

  3. 3

    To exaggerate

Source: https://en.wiktionary.org/wiki/yeast, https://en.wiktionary.org/wiki/yeasts