DictionaryRoot: udder
Old English
udder
milk glands of a cow or similar animal
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noun
udder
UH-der/ˈʌdər/
A milk-producing organ with teats in cows and similar animals.
Etymology
Old English udder already named the animal’s milk glands, especially when large and baggy with more than one teat. The modern meaning preserves that concrete anatomical sense.