(anatomy) A small cavity surrounding the bones of the middle ear.

plural of cavity resonator

(anatomy) The thoracic-abdominal cavity, containing the heart, etc.

(anatomy) Synonym of acetabulum

(physics) The coupled interaction between matter and an electromagnetic field within a resonating structure

plural of body cavity search

(law) A search performed by law enforcement on a criminal suspect to insure that the suspect is not hiding anything in a body cavity.

(physics, dynamics) A theoretical type of drive that does not conform to Newton's Laws of Motion, violating the conservation of momentum, using a resonant cavity where microwaves are beamed.