dairy cow

noun2

1. •
   Any breed of cow bred for the ability to produce large quantities of milk, from which dairy products are made; an individual cattle beast of such a breed; especially, a female cow who has calved and lactated.

   • The Holstein Friesian is an excellent dairy cow. [breed]
   • He runs a herd of dairy cows, including his own bulls. [cattle beast]
2. •
   A black-and-white varietal of the Porcellio laevis woodlouse.