rust
Other forms: rusted; rusting; rusts; rustly
Rust is the reddish-brown stuff that forms over time on metal that's gotten wet. Your dad's beat-up old car probably has some rust on it somewhere.
If you leave your bike out overnight in the rain, it'll be fine — you can dry it off the next day. If you leave it out for several rainy weeks, though, your bike will end up with rust on it. Rust appears as brown spots where the combination of water and oxygen has coated the metal with a compound that chemists call an oxide. Rust, which is also a verb, comes from a Germanic root meaning "redness."
Definitions of rust
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a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture
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type of:
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ferric oxide
a red oxide of iron
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ferric oxide
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the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water
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synonyms:
rusting
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type of:
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corroding, corrosion, erosion
erosion by chemical action
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oxidation, oxidisation, oxidization
the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reduction
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corroding, corrosion, erosion
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become destroyed by water, air, or a corrosive such as an acid
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become coated with oxide
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cause to deteriorate due to the action of water, air, or an acid
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of the brown color of rust
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synonyms:
rust-brown, rusty
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chromatic
being, having, or characterized by hue
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chromatic
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any of various fungi causing rust disease in plants
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synonyms:
rust fungus
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types:
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Melampsora lini, flax rust, flax rust fungus
fungus causing flax rust
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Cronartium ribicola, blister rust
fungus causing white pine blister rust and having a complex life cycle requiring a plant of genus Ribes as alternate host
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Puccinia graminis, wheat rust
rust fungus that attacks wheat
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Gymnosporangium juniperi-virginianae, apple rust, cedar-apple rust
rust fungus causing rust spots on apples and pears etc
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type of:
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fungus
an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia
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a plant disease that produces a reddish-brown discoloration of leaves and stems; caused by various rust fungi
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types:
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blister rust, white pine blister rust, white-pine rust
any of several diseases of pines caused by rust fungi of the genus Cronartium and marked by destructive invasion of bark and sapwood and producing blisters externally
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type of:
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plant disease
a disease that affects plants
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blister rust, white pine blister rust, white-pine rust
Pronunciation
US
/rəst/
UK
/rəst/
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