First Known Use of spherule
Medical Definition of spherule
: a thick-walled spherical structure enclosing endospores and occurring in the parasitic form of fungi of the genus Coccidioides <Histopathological examination revealed spherules that were consistent with coccidioides species and focal organizing pneumonia with eosinophilia.—Holenarasipur R. Vikram et al., The New England Journal of Medicine, 2 June 2011>
Seen and Heard
What made you want to look up spherule? Please tell us where you read or heard it (including the quote, if possible).