pneumocele
/ˈnjuːmə(ʊ)siːl/Medicine
noun
An abnormal, localized collection of air or gas in a part of the body; especially an expansile air-filled lesion of a paranasal sinus.
Origin
Mid 19th century; earliest use found in The Lancet. From pneumo- + -cele. Compare French pneumocèle, Italian pneumocele.