A cracker or a small, thin piece of bread or toast spread with cheese, meat, or relish and served as an appetizer. [French, from canapÃ©, couch, from Medieval Latin canÄpÄum, mosquito net; see canopy.]
Pickle brine is a traditional Polish hangover remedy as well, say the Strybels: Fill a glass with equal parts chilled pickle brine and ice-cold club soda, and drink the mixture down at once.
The term pickling refers to a preservation process in which foods are immersed in vinegar or brine. Often times, the pickled 'food' is just referred to as pickles. So, technically, the answer to your question is it could be a fruit, vegetable or neither of the two (i.e. you could have pickled pigs feet).