chow·der 
(choudər)
(choudər)n.
1. A thick soup containing fish or shellfish, especially clams, and vegetables, such as potatoes and onions, in a milk or tomato base.
2. A soup similar to this seafood dish: corn chowder.
[French chaudière, stew pot, from Old French, from Late Latin caldāria; see CAULDRON.]