plural noun
Mi·​cro·​thy·​ri·​a·​ce·​ae | \ ˌmīkrəˌthīrēˈāsēˌē\

Definition of Microthyriaceae

: a family of ascomycetous fungi (order Microthyriales) with shield-shaped or radiate perithecia

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History and Etymology for Microthyriaceae

New Latin, from Microthyrium, type genus (from micr- + Greek thyrion, diminutive of thyra door) + -aceae

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