(historical) An adjustable piece of armour for guarding the throat, etc. during jousting.

(biology) The volume of air associated with different phases of the respiratory cycle.

plural of volcanic bomb

(volcanology) A tephra, larger than 64 mm (2.5 inches) in diameter, formed when a volcano ejects viscous fragments of lava during an eruption.

(idiomatic, rare) To make someone perform a task or duty, especially one they are not prepared or willing to do.

(tennis) A tactic where a player serves and immediately moves towards the net in an attempt to hit a volley.

(tennis) To play using this tactic.

(law) A person (also called gestor) who acts on behalf of another (dominus), without the latter's prior consent. Such agency is called negotiorum gestio.

plural of volte-face

Synonym of cryovolcano