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:

the sun's rays are redirected randomly into the atmosphere when they strike small particles in...

Subject:

cinders from a volcano

Subject:

(also called a debris slope or talus slope) slope element formed by deposition at the base of...

Subject:

(also called a periodic river) a river that flows only during the rainy season

Subject:

difference between the average summer temperature and the average winter temperature

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