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:

a gas that occurs occur in a fixed amount in the atmosphere

Subject:

river that flows all the time

Subject:

the second set of teeth formed in mammals. In humans there are thirty-two permanent teeth.

Subject:

allows water to move through

Subject:

two lines that make a 90° angle.

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