nitrous oxide
noun/ˌnaɪtrəs ˈɒksaɪd/
/ˌnaɪtrəs ˈɑːksaɪd/
(also informal laughing gas)
[uncountable]- a gas used especially in the past by dentists to prevent you from feeling pain
Want to learn more?
Find out which words work together and produce more natural sounding English with the Oxford Collocations Dictionary app.
Check pronunciation:
nitrous oxide