Definition of ash dieback in English:

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ash dieback

noun

A serious fungal disease of the European ash, characterized by the progressive death of the tree’s branches.
  • The disease is caused by Hymenoscyphus pseudoalbidus (also called Chalara fraxinea), subdivision Ascomycotina.
Example sentences
  • The first outbreak of ash dieback has been confirmed in Northern Ireland.
  • Earlier this week industry, conservation groups and scientists met for a summit on how to deal with ash dieback.
  • Ash dieback may have arrived in Britain after spores were blown on the wind from continental Europe.

For editors and proofreaders

Syllabification: ash die·back

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