Definition of pneumocystosis in US English:

pneumocystosis

noun

Medicine
  • Infection with or disease caused by organisms of the genus Pneumocystis; especially pneumocystis pneumonia.

Origin

1950s; earliest use found in American Journal Clinical Pathology. From Pneumocystis + -osis.

Pronunciation

pneumocystosis

/ˌnjuːmə(ʊ)sɪsˈtəʊsɪs/