the yeast foam that appears on the surface of malt liquors as they ferment
Origin of barmMiddle English berme ; from Old English beorma, yeast ; from Indo-European base an unverified form bher-, to boil up from source ferment, breath
The yeasty foam that rises to the surface of fermenting malt liquors.
Origin of barmMiddle English berme, from Old English beorma, yeast; see bhreu- in Indo-European roots.
From Old English bearm.
(countable and uncountable, plural barms)
- Foam rising upon beer, or other malt liquors, when fermenting, and used as leaven in making bread and in brewing; yeast.
- A small, flat, round individual loaf or roll of bread.