Rust

Definition of Rust

n.1.(Chem.) The reddish yellow coating formed on iron when exposed to moist air, consisting of ferric oxide or hydroxide; hence, by extension, any metallic film of corrosion.
2.(Bot.) A minute mold or fungus forming reddish or rusty spots on the leaves and stems of cereal and other grasses (Trichobasis Rubigo-vera), now usually believed to be a form or condition of the corn mildew (Puccinia graminis). As rust, it has solitary reddish spores; as corn mildew, the spores are double and blackish.
3.That which resembles rust in appearance or effects.
Sacred truths cleared from all rust and dross of human mixtures.
- Eikon Basilike.
Rust joint
a joint made between surfaces of iron by filling the space between them with a wet mixture of cast-iron borings, sal ammoniac, and sulphur, which by oxidation becomes hard, and impervious to steam, water, etc.
Rust mite
(Zool.) a minute mite (Phytopius oleivorus) which, by puncturing the rind, causes the rust-colored patches on oranges.
v. i.1.To contract rust; to be or become oxidized.
[imp. & p. p. Rusted; p. pr. & vb. n. Rusting.]
If gold ruste, what shall iron do?
- Chaucer.
Our armors now may rust.
- Dryden.
2.To be affected with the parasitic fungus called rust; also, to acquire a rusty appearance, as plants.
3.To degenerate in idleness; to become dull or impaired by inaction.
Must I rust in Egypt? never more
Appear in arms, and be the chief of Greece?
- Dryden.
v. t.1.To cause to contract rust; to corrode with rust; to affect with rust of any kind.
Keep up your bright swords, for the dew will rust them.
- Shak.
2.To impair by time and inactivity.

Related Words

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