rust

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“
This rust is a chemical compound of iron and oxygen; in other words, oxide of iron.

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Definitions (70)

Toggle American Heritage definitions American Heritage Dictionary (14)

  1. noun Any of various powdery or scaly reddish-brown or reddish-yellow hydrated ferric oxides formed on iron and iron-containing materials by low-temperature oxidation in the presence of water.
  2. noun Any of various metallic coatings, especially oxides, formed by corrosion.
  3. noun A stain or coating resembling iron rust.
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Examples (50)

  • "He showed me this knife that was all rusted from the wet plaster, but the rust was also bleeding-almost blossoming through the paint," recalled Johnny. —  Home | The New York Observer
  • Skinny: Niittymaki hasn't been very active lately, and the rust was evident in Sunday's 4-3 loss to the Bruins.
  • Baron Davis and Marcus Camby have been back for four games - the rust should be off, right? —  Clips Nation
  • One of the most common fears from people when it comes to all natural rust remover is that since it has no acids in it, it will not have any strength to even be called a rust stain remover. —  xml's Blinklist.com
  • Wheat Rust Pustule - Wheat rust is a common and serious disease, reducing crop yields both in the United States and in other wheat-growing areas of the world.
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This word has been looked up 174 times.

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Etymologies (3)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. Middle English, from Old English rūst; see reudh- in Indo-European roots.

Toggle Century etymologies Century Dictionary (2)

  1. from Middle English rust, rost, roust, from Anglo-Saxon rust = Old Saxon rost = Dutch roest = Middle Low German rost, rust = Old High German Middle High German G. rost = Swedish rost = Danish rust (not found in Gothic (Moesogothic), where nidwa is used), rust; with formative -st, from rud-, root of Anglo-Saxon reád, red, rudu, redness: see red. Cf. Icelandic ryth, rust, Middle High German rot, rust, etc., OSlav. rūzda, Lithuanian rūdis, Lettish rūsa, rust, Latin rubigo, robigo, rust; all from the same root.
  2. from Middle English rusten, from Anglo-Saxon *rustian (not authenticated, the one instance cited by Lye involving the adjective rustig, rusty) = Dutch roesten = Middle Low German rosten, rusten = Old High German rostēn, Middle High German G. rosten = Swedish rosta = Danish ruste, rust; from the noun.
 

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/rəst/
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