A chemical vessel consisting of two portions unequally exposed to the heat of the fire, and with connecting pipes or passages, through which the fluid rises from the overheated portion, and descends from the relatively colder, maintaining a circulation.
Having to do with the circulation, the movement of fluid in a regular or circuitous course. Although the adjective "circulatory" need not necessarily refer to the circulation of the blood, for all practical purposes today it does. A circulatory problem is taken usually to be a problem with the blood circulation, for example with heart failure. See the entire definition of Circulatory