An empty space within a solid object
customs officers found a secret cavity in the car
An air-filled pocket or passage.
A cavity or system of cavities in the body of vertebrates and some invertebrates, in which the internal organs are located; the coelom.
The cavity of the mouth.
The space within a pit, extending from the pit membrane to the pit aperture.
The space in the interior of a tooth that contains the pulp
A wall formed from two thicknesses of brickwork or blockwork with a space between them
The space enclosed between the mantle and the body of a mollusc, brachiopod, etc., containing respiratory organs.
The hollow of a mould.
A volume delimited with reflective boundaries within which electromagnetic radiation undergoes repeated internal reflection; especially one designed to give constructive interference for a particular frequency of radiation, as in a laser.
= mantle cavity.
The (potential) space between the visceral and parietal layers of the pleura.
An enclosed space within which resonance occurs; specifically = resonator.
A shallow depression on a bone into which another bone fits to form a joint, especially that on the scapula into which the head of the humerus fits
The body cavity lined by peritoneum; specifically the abdominal cavity of a mammal.