Find Definitions

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.

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Subject:

an accurate way of expressing direction in degrees

Subject:

plane that separates distinct layers of sedimentary rock

Subject:

(also called a bell-shaped pyramid) a population pyramid with a relatively narrow base and broad...

Subject:

see beehive-shaped population pyramid

Subject:

variety of different plant and animal species in an ecosystem

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