plural noun Hys·te·ri·a·les \hə̇ˌstirēˈā(ˌ)lēz\

Definition of Hysteriales

  1. :  an order of fungi of the subclass Euascomycetes that is characterized by elongated ascomata opening by a longitudinal slit and includes various fungi which cause leaf cast of conifers — see hysteriaceae

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Origin and Etymology of hysteriales

New Latin, from Hysterium, genus of fungi + -ales

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