A chamber, in a hydraulic system, in which air (or some other gas) is compressed to regulate the flow of a fluid.

plural of yeoman of the chamber

(obsolete) a servant in a royal household who had access to the bedchamber

An enclosed space, within a heat engine, in which the fuel is mixed and reacted with air or other oxidizing agent in a controlled manner.

plural of chamber pot

A marine mollusc, of the family Nautilidae native to the Pacific Ocean and Indian Ocean, which has tentacles and a spiral shell with a series of air-filled chambers. / A nautilus, Nautilus pompilius.

A container used for urination and defecation, particularly those used in early modern towns before the advent of the flush toilet.

plural of echo chamber

A room or other enclosed space that is highly conducive to the production of echoes, particularly one that has been designed and built for this purpose.

A chamber, often below ground level, used to bury the remains of the dead.