Glossary

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Looking for a quick definition?

We’ve got loads of key subject terms in our subject glossaries. There are three ways of finding what you are looking for:

  • First click on the letters of the alphabet to browse for terms.
  • Select a subject from the drop-down menu above to filter the terms by Subject.
  • Or lastly, type the term you are looking for into the search box.

EXAMPLES

Here are some examples of the kinds of definitions you’ll find on this page.

Subject:

an atmospheric gas made of three oxygen molecules bonded together (O3).

Subject:

damage to the ozone layer caused by pollutants such as CFCs.

Subject:

a layer of ozone gas which occurs naturally in the upper atmosphere, and protects life by...

Subject:

an artificial device that helps to stimulate and regulate the heart muscle.

Subject:

a scientist who studies fossils.

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