Definition of ash dieback in English:

ash dieback

Syllabification: ash die·back

noun

  • A serious fungal disease of the European ash, characterized by the progressive death of the tree’s branches: the number of woodland sites where ash dieback has been detected has doubled
    • The disease is caused by Hymenoscyphus pseudoalbidus (also called Chalara fraxinea), subdivision Ascomycotina
    More example sentences
    • It has emerged that 100,000 ash trees have already been burnt to stop the spread of ash dieback.
    • The threat of ash dieback is mitigated by the vigour with which new trees regenerate in the British climate.
    • The first outbreak of ash dieback has been confirmed in Northern Ireland.

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