udder

/ˈʌdər/
noun
  1. The organ of a female mammal, such as a cow, goat, or sheep, that produces milk and has two or more teats.
    • The vet checked the sheep's udder for signs of infection.
    • The farmer gently milked the cow's udder by hand.
    • A goat's udder is smaller than a cow's but still produces plenty of milk.