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

---

oxide Scientific  

/ ŏk′sīd′ /

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

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