rhizoverbBeta
DictionaryoxidationChemical electron loss
noun

oxidation

ahk-sih-DAY-shun/ˌɑːksɪˈdeɪʃn/

A chemical process in which a substance loses electrons, often by reacting with oxygen.

Oxidation leaves reddish-brown rust on the iron chain.

A close view of an iron chain undergoing rusting, with reddish-brown oxide flaking from the links and contrasting clearly with remaining bare gray iron.
Etymology
oxidFrenchto combine with oxygen
+ationFrenchact or process

French oxider, “oxidize,” was formed from oxide, a compound of oxygen with another element. With the action-noun ending, oxidation names the process of producing such a combination.

In context

History of Simple Things1:07
When iron is exposed to both oxygen and moisture, yes, even just humidity in the air, it undergoes oxidation.
How Rust Forms and Why It Doesn’t Touch Aluminum

More examples

  • The experiment measured oxidation at the metal surface.
  • A protective coating slowed oxidation.
  • In that reaction, oxidation involved the loss of electrons.

Forms

oxidation

oxidize verb — undergo oxidation

Similar words

corrosion
Corrosion is material deterioration, often involving oxidation; oxidation is a broader chemical process.
reduction
Reduction gains electrons; oxidation loses them.