Cavity
# Cavity

Cavity may refer to:

## Biology and healthcare

* Body cavity, a fluid-filled space in many animals where organs typically develop
   * Gastrovascular cavity, the primary organ of digestion and circulation in cnidarians and flatworms
* Dental cavity or tooth decay, damage to the structure of a tooth
* Lung cavity, an air-filled space within the lung
* Nasal cavity, a large, air-filled space above and behind the nose in the middle of the face

## Radio frequency resonance

* Microwave cavity or RF cavity, a cavity resonator in the radio frequency range, for example used in particle accelerators
* Optical cavity, the cavity resonator of a laser
* Resonant cavity, a device designed to select for waves of particular wavelengths

## Other uses

* Cavity (band), a sludge metal band from Miami, Florida
* Cavity method, a mathematical method to solve some mean field type of models
* Cavity wall, a wall consisting of two skins with a cavity
