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:

shape of the land

Subject:

(also called orographic rain) rain that occurs when air rises up the windward side of a mountain...

Subject:

observing and gathering data about the Earth's surface from a distance above it

Subject:

(also called an inexhaustible resource) resource that does not take years to form and can be...

Subject:

scale expressed as a ratio

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