Dictionary.com
definitions
  • synonyms

black rust

See more synonyms for black rust on Thesaurus.com
noun Plant Pathology.
  1. any of several diseases of plants caused by rusts and characterized by black discoloration resulting from the fungal teliospores.
Show More

Origin of black rust

An Americanism dating back to 1780–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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
Show More
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012