Pneumocystis
noun
Pneu·mo·cys·tis
ˌn(y)ü-mə-ˈsis-təs
1
: a genus of ascomycetous fungi that were formerly classified as protozoans and include one (P. jirovecii synonym P. carinii) causing pneumonia especially in immunocompromised individuals
Cite this Entry
“Pneumocystis.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Pneumocystis. Accessed 7 Jul. 2026.
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