A desiccator fitted with a stopcock whereby it can be evacuated

plural of vacuum tube

A state of relative anarchy compared to neighboring states, often caused by death of the head of state before a successor could be designated.

(psychology, rare) The theoretic counterpart to penis envy; the alleged unconscious desire of a man to possess a vagina.

(physics) The underlying background energy of empty space associated with constant vacuum fluctuations.

(US) A building or piece of property used as a secondary residence for vacation purposes; may be rented to others when not in use.

plural of vacuum cleaner

(formal) An emission or expulsion of air from the vagina.

A piece of equipment used for extraction of gas or vapour from an enclosed space, leaving the container with a partial vacuum.

(anatomy) A synovium.