noun Mi·cro·sphae·ra \-ˈsfirə\

Definition of Microsphaera

  1. :  a genus of powdery mildews (family Erysiphaceae) having several asci in each perithecium and the appendages once or more dichotomously branched — see lilac mildew

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Origin and Etymology of microsphaera

New Latin, from micr- + -sphaera

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