5 entries found for rust.
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Main Entry: 1rust
Pronunciation: rst
Function: noun 1: a reddish brittle coating formed on iron especially when chemically attacked by moist air and composed chiefly of ferric oxide 2 a: any of numerous destructive diseases of plants caused by fungi and characterized by reddish brown spots b: any of an order of fungi that cause plant rusts 3: a reddish brown