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barm

[bahrm] /bɑrm/
noun
1.
yeast formed on malt liquors while fermenting.
Origin
1000
before 1000; Middle English berme, Old English beorma; cognate with Frisian berme, German Bärme, Swedish bärme; akin to ferment
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for barm

barm

/bɑːm/
noun
1.
the yeasty froth on fermenting malt liquors
2.
an archaic or dialect word for yeast
Word Origin
Old English bearm; related to beran to bear, Old Norse barmr barm, Gothic barms, Old High German barm see ferment
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for barm
n.

Old English beorma "yeast, leaven," also "head of a beer," from Proto-Germanic *bermon- (cf. Dutch berm, Middle Low German barm), from PIE root *bher- (4) "to cook, bake" (cf. Latin fermentum "substance causing fermentation," Sanskrit bhurati "moves convulsively, quivers," Middle Irish berbaim "I boil, seethe;" see brew (v.)).

Online Etymology Dictionary, © 2010 Douglas Harper
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Related Abbreviations for barm

BARM

block acceptance reporting mechanism
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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