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 instrument that measures the volume of air entering and leaving the lungs.

a special effect that shows action in two different places at the same time. Often used with a...

Subject:

(also called voluntary population movement) the voluntary movement of people from one place to...

a reaction that takes place automatically by itself, without requiring extra stimulation.

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