"Dioxide" is a chemical term that describes a compound containing two oxygen atoms per molecule.

Here's a breakdown:

* Di- means "two".

* Oxide refers to a compound containing oxygen.

So, a dioxide is a molecule with two oxygen atoms bonded to another element or group of elements.

Examples of Dioxides:

* Carbon dioxide (CO2): A major greenhouse gas, produced by respiration and combustion.

* Silicon dioxide (SiO2): Found in sand and quartz.

* Titanium dioxide (TiO2): Used in white paint and sunscreen.

* Nitrogen dioxide (NO2): A pollutant that contributes to smog.

The chemical formula for a dioxide typically has the form XO2, where X represents the other element or group of elements.

Let me know if you'd like to know more about a specific dioxide!