DictionaryRoot: cudu
Old English
cudu
cud; gum, resin
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noun
cud
KUD/kʌd/
Partly digested food brought back to the mouth by animals such as cows to be chewed again.
Etymology
Old English cudu already meant food brought back up for chewing, but also meant gum, resin, or mastic. The modern sense preserves the animal-feeding meaning.