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.

if one variable increases, the other variable decreases at a fixed rate.

ion

an atom of an element that loses or gains an electron and becomes electrically charged.

substances that are able to swap ions.

the transfer of electrons from one atom to another atom to form positive and negative ions...

the radius of an ion of an atom, from the nucleus to the outermost.

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