rust : | |||||||||||||
any of various fungi causing rust disease in plants the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water a reddish-brown discoloration of leaves and stems caused by a rust fungus a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture become coated with oxide of the color of rust chromatic become destroyed by water, air, or an etching chemical such as an acid; "The metal corroded"; "The pipes rusted" cause to deteriorate due to the action of water, air, or an acid; "The acid corroded the metal"; "The steady dripping of water rusted the metal stopper in the sink" |
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