| rust | | |
| n. (substance) | 1. rust | a red or brown oxide coating on iron or steel caused by the action of oxygen and moisture. |
| ~ goethite, gothite | a red or yellow or brown mineral; an oxide of iron that is a common constituent of rust. |
| ~ ferric oxide | a red oxide of iron. |
| n. (state) | 2. rust | a plant disease that produces a reddish-brown discoloration of leaves and stems; caused by various rust fungi. |
| ~ plant disease | a disease that affects plants. |
| ~ blister rust, white-pine rust, white pine blister 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. |
| n. (process) | 3. rust, rusting | the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water. |
| ~ corroding, corrosion, erosion | erosion by chemical action. |
| ~ oxidation, oxidisation, oxidization | the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reduction. |
| ~ ferric oxide | a red oxide of iron. |
| n. (plant) | 4. rust, rust fungus | any of various fungi causing rust disease in plants. |
| ~ fungus | an organism of the kingdom Fungi lacking chlorophyll and feeding on organic matter; ranging from unicellular or multicellular organisms to spore-bearing syncytia. |
| ~ order uredinales, uredinales | rust fungi: parasitic fungi causing rust in plants; sometimes placed in. |
| ~ aecium | fruiting body of some rust fungi bearing chains of aeciospores. |
| ~ aeciospore | spore of a rust fungus formed in an aecium. |
| ~ flax rust, flax rust fungus, melampsora lini | fungus causing flax rust. |
| ~ 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. |
| ~ puccinia graminis, wheat rust | rust fungus that attacks wheat. |
| ~ apple rust, cedar-apple rust, gymnosporangium juniperi-virginianae | rust fungus causing rust spots on apples and pears etc. |
| v. (change) | 5. corrode, rust | become destroyed by water, air, or a corrosive such as an acid.; "The metal corroded"; "The pipes rusted" |
| ~ decay, dilapidate, crumble | fall into decay or ruin.; "The unoccupied house started to decay" |
| ~ corrode, rust, eat | 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" |
| ~ eat away, fret | wear away or erode. |
| v. (change) | 6. corrode, eat, rust | 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" |
| ~ damage | inflict damage upon.; "The snow damaged the roof"; "She damaged the car when she hit the tree" |
| ~ rust, corrode | become destroyed by water, air, or a corrosive such as an acid.; "The metal corroded"; "The pipes rusted" |
| v. (change) | 7. rust | become coated with oxide. |
| ~ oxidise, oxidate, oxidize | add oxygen to or combine with oxygen. |
| ~ oxidate, oxidize, oxidise | enter into a combination with oxygen or become converted into an oxide.; "This metal oxidizes easily" |
| adj. | 8. rust, rust-brown, rusty | of the brown color of rust. |
| ~ chromatic | being or having or characterized by hue. |
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