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:

irreversible disease where the alveoli are damaged, resulting in breathing difficulties.

Subject:

the separation of large fat molecules into smaller drops for easy digestion.

Subject:

extremely hard, calcium-rich substance which covers the crown of the tooth.

Subject:

mass extinction event of 65 million years ago, in which about 85% of all species on Earth died...

Subject:

mass extinction event of 250 million years ago, in which about 90% of all species on Earth died...

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