A car the body of which consists of a tank for carrying liquids such as oil, molasses, vinegar, acids, compressed gasses and granular solids.
A tank car is a piece of railroad rolling stock designed to carry liquefied loads, petroleum products, liquid chemicals and gasses. Many variants exist due to the wide variety of liquids and gasses that can be transported. Tank cars can be insulated or non-insulated, pressurized or non-pressurized, and designed for single or multiple loads.