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 irrational root, which is a root that cannot be written as a fraction in the form a...

Subject:

the sum of the areas of all the planes of a three-dimensional object.

Subject:

a graph or picture that looks identical on either side of a line, in particular, the y...

Subject:

a straight line that touches a curve at exactly one point.

Subject:

trigonometric ratio, expressed as opposite side divided by adjacent side in a right-angled...

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