[Haskell-cafe] Defining new operators

Hello, I have created the following function: dist :: String -> [[String]] -> [[String]] dist x y = [ x:e | e<-y ] eg.: dist "1M" [[], ["2M"], ["2M, 3M"]] = [["1M"],["1M","2M"],["1M","2M, 3M"]] How can I create an operator that perform the same function as dist? I want to write something like: "1M" ++ [[], ["2M"], ["2M", "3M"]] Thanks in advance. Rodrigo.