barm
1. [ noun ] a commercial leavening agent containing yeast cells; used to raise the dough in making bread and for fermenting beer or whiskey
Synonyms: yeast
Related terms: leaven brewer's_yeast mother yeast_cake
Similar spelling:   barmy
  barroom
  bairn
  Barron
  barren
  barium
  Barham
  Bahrein
  Bahrain
  barn