Wa″ter dog′ (?). 1. (Zoöl.) A dog accustomed to the water, or trained to retrieve waterfowl. Retrievers, waters spaniels, and Newfoundland dogs are so trained.
2. (Zoöl.) The menobranchus.
3. A small floating cloud, supposed to indicate rain.
4. A sailor, esp. an old sailor; an old salt.