D defs.my
Entry 4 senses Webster, 1913

Water dog

/wôt'-ẽr dôg/ · Wa·ter dog · IPA
01 A dog accustomed to the water, or trained to retrieve waterfowl. Retrievers, waters spaniels, and Newfoundland dogs are so trained.
  1. 1.
    A dog accustomed to the water, or trained to retrieve waterfowl. Retrievers, waters spaniels, and Newfoundland dogs are so trained.(Zool.)
  2. 2.
    The menobranchus.(Zool.)
  3. 3.
    A small floating cloud, supposed to indicate rain.
  4. 4.
    A sailor, esp. an old sailor; an old salt.[Colloq.]