Definition of cud noun from the Oxford Advanced Learner's Dictionary

 

cud

 noun
noun
BrE BrE//kʌd//
 
; NAmE NAmE//kʌd//
 
[uncountable]
 
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the food that cows and similar animals bring back from the stomach into the mouth to chew again cows chewing the cud Word Origin Old English cwidu, cudu, of Germanic origin; related to German Kitt ‘cement, putty’ and Swedish kåda ‘resin’.
See the Oxford Advanced American Dictionary entry: cud