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 total number of people living in an area divided by the total area of land they live on

Subject:

an area where underground water is stored in a permeable layer of rock that lies between two...

Subject:

a borehole that is sunk into the permeable strata of an artesian basin to access underground...

Subject:

direction in which a slope faces

Subject:

layer of air surrounding Earth

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