pneumothorax
noun
pneu·mo·tho·rax ˌnü-mə-ˈthȯr-ˌaks 
ˌnyü-
: a condition in which air or other gas is present in the pleural cavity and which occurs spontaneously as a result of disease or injury of lung tissue, rupture of air-filled pulmonary cysts, or puncture of the chest wall or is induced as a therapeutic measure to collapse the lung
Example Sentences
Recent Examples on the Web CJ McCollum is listed as having a right pneumothorax (noo-moe-THOR-aks), which is a collapsed lung. 
oregonlive, 7 Dec. 2021 South Korean actor Jang Dong-gun, best known for his roles in Friend (2001) and Taegukgi: The Brotherhood of War (2004), skipped service after he was diagnosed with pneumothorax, a rare condition in which sufferers’ lungs collapse. Danny Kim, Billboard, 20 Sep. 2019 Two valve patients who went right home died of pneumothorax, and a third who suffered it in the hospital died 13 days after getting the valves. Marie Mccullough, Philly.com, 22 May 2018 Any time a person inserts a needle into a patient, there’s a risk ranging from an infection to a pneumothorax, or collapsed lung. Shari Rudavsky, Indianapolis Star, 14 Mar. 2018 If any part of the lung lining is punctured, that could result in pneumothorax (collapsed lung). Profootballdoc, sandiegouniontribune.com, 2 Oct. 2017
oregonlive, 7 Dec. 2021 South Korean actor Jang Dong-gun, best known for his roles in Friend (2001) and Taegukgi: The Brotherhood of War (2004), skipped service after he was diagnosed with pneumothorax, a rare condition in which sufferers’ lungs collapse. Danny Kim, Billboard, 20 Sep. 2019 Two valve patients who went right home died of pneumothorax, and a third who suffered it in the hospital died 13 days after getting the valves. Marie Mccullough, Philly.com, 22 May 2018 Any time a person inserts a needle into a patient, there’s a risk ranging from an infection to a pneumothorax, or collapsed lung. Shari Rudavsky, Indianapolis Star, 14 Mar. 2018 If any part of the lung lining is punctured, that could result in pneumothorax (collapsed lung). Profootballdoc, sandiegouniontribune.com, 2 Oct. 2017 Word History
Etymology
New Latin
First Known Use
1821, in the meaning defined above
Medical Definition
pneumothorax
noun
pneu·mo·tho·rax ˌn(y)ü-mə-ˈthō(ə)r-ˌaks, -ˈthȯ(ə)r-
plural pneumothoraxes or pneumothoraces -ˈthōr-ə-ˌsēz
: a condition in which air or other gas is present in the pleural cavity and which occurs spontaneously as a result of disease or injury of lung tissue, rupture of air-filled pulmonary cysts, or puncture of the chest wall or is induced as a therapeutic measure to collapse the lung see tension pneumothorax compare oleothorax