IPA: //bɑrm//
KK: /bɑrm/
The frothy substance made of yeast that forms on top of fermenting beer or other malt drinks.
The brewer carefully skimmed the barm off the top of the fermentation tank.
The word 'barm' originates from Old English 'beorma', meaning yeast or foam. It specifically refers to the frothy substance that forms on top of fermenting liquids, particularly beer or ale.
Think of 'barm' as the frothy 'yeast' that rises to the top during fermentation, helping you remember that it refers to the foam in brewing.