water dog

1. (Zool.) A dog accustomed to the water, or trained to retrieve waterfowl. Retrievers, waters spaniels, and Newfoundland dogs are so trained. [ 1913 Webster ]

2. (Zool.) The menobranchus. [ 1913 Webster ]

3. A small floating cloud, supposed to indicate rain. [ 1913 Webster ]

4. A sailor, esp. an old sailor; an old salt. [ Colloq. ] [ 1913 Webster ]