1) Freight rolling stock 
[rail] In railroad terminology, a stock car or cattle wagon (British English) is a type of rolling stock used for carrying livestock (not carcasses) to market. A traditional stock car resembles a boxcar with louvered instead of solid car sides (and sometimes ends) for the purpose of providing ventilation; stock cars can be single-level for ...
(from the article `freight car`) ...Certain types of boxcars, known as refrigerator cars, are heavily insulated and specially cooled to convey fresh or frozen foods over long ...
[n] - a car kept in dealers` stock for regular sales 2. [n] - a racing car with the basic chassis of a commercially available car
noun a racing car with the basic chassis of a commercially available car
a standard model of automobile changed in various ways for racing purposes. · Also calleda boxcar for carrying livestock.