Longman Dictionary of Contemporary English homepage

Date: 1800-1900
Language: German
Origin: ozon, from Greek, from ozein 'to smell'

ozone

noun
     
o‧zone [uncountable]
1 technicalHCSGE a poisonous blue gas that is a type of oxygen
2 informalDN air near the sea, thought to be fresher and healthier

Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.

Explore our topic dictionary