Dioxide :
dyoksid
English Meaning :
(Noun : An oxide containing two atoms of oxygen in the molecule)
(Noun : An oxide containing two atoms of oxygen in the molecule)
Example : Previously, only the electricity sector and non-ferrous smelting industry were subject to the limits on nitrogen oxide and sulphide dioxide , two of the most notorious and significant contributors to smog.
Previously, only the electricity sector and non-ferrous smelting industry were subject to the limits on nitrogen oxide and sulphide dioxide , two of the most notorious and significant contributors to smog.
Word Example from TV Shows :

It's a silicon DIOXIDE crystal,
otherwise known as quartz.
The Big Bang Theory Season 12, Episode 2

It's a silicon DIOXIDE crystal,
otherwise known as quartz.
The Big Bang Theory Season 12, Episode 2