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 single pair of coordinate values

Subject:

a hill like a butte but that has a very narrow top

Subject:

boundary between the warm, light westerly air mass and the cold, dense polar easterly air mass...

Subject:

a series of coordinates joined together to enclose an area

Subject:

narrow gap between mountains formed from a dyke

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