black rust


nounPlant Pathology.
  1. any of several diseases of plants caused by rusts and characterized by black discoloration resulting from the fungal teliospores.

Origin of black rust

1
An Americanism dating back to 1780–90

Words Nearby black rust

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How to use black rust in a sentence

British Dictionary definitions for black rust

black rust

noun
  1. a stage in any of several diseases of cereals and grasses caused by rust fungi in which black masses of spores appear on the stems or leaves

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