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Synonyms

oxide

American  
[ok-sahyd, -sid] / ˈɒk saɪd, -sɪd /
Also oxid

noun

Chemistry.
  1. a compound in which oxygen is bonded to one or more electropositive atoms.


oxide British  
/ ˈɒksaɪd /

noun

  1. any compound of oxygen with another element

  2. any organic compound in which an oxygen atom is bound to two alkyl or aryl groups; an ether or epoxide

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

oxide Scientific  
/ ŏksīd′ /
  1. A compound of oxygen and another element or radical. Water (H 2 O) is an oxide.


Other Word Forms

  • oxidic adjective

Etymology

Origin of oxide

First recorded in 1780–90; from French (now oxyde ), blend of ox(ygène) oxygen and (ac)ide acid

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

USA Rare Earth invested in Carester, a French rare-earth processing firm, to access its oxide output for a new metal-making facility.

From Barron's • Apr. 9, 2026

USA Rare Earth’s CEO stated the deal advances its integrated value chain, aiming for Europe’s first rare earth oxide and metal-making platform.

From Barron's • Apr. 9, 2026

Chief among them is getting the right mix of calcium oxide and its proprietary binding agent, so the pellets effectively store energy while holding their shape over many charge-discharge cycles.

From The Wall Street Journal • Mar. 27, 2026

To place individual indium atoms precisely on the surface of hafnium oxide, the ETH team developed several new synthesis methods in collaboration with other research groups.

From Science Daily • Mar. 20, 2026

On their thirtieth wedding anniversary, George gave Margaret a check for one hundred dollars, along with a note scribbled on the back of an aluminum oxide wrapper: “Next 30 years not as rough. Love, George.”

From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot