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:

an organ system that passes nutrients, gases, hormones, blood cells, etc. to and from cells in...

Subject:

the perimeter of a circle.

Subject:

the replacement of liver tissue by scar tissue due to damage to liver cells caused by excessive...

Subject:

a thin uniform layer or sheet of hazy cloud that forms high in the atmosphere

Subject:

a thin, white, wispy cloud that forms high in the atmosphere

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