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.

the process of nuclear fusion.

centre part of an atom with positive charge concentrated in a tiny kernel.

an atom with a unique atomic number and unique mass number.

molecule where the ratio of atoms is 1 : 6 , e.g. SF6

when a reaction produces a gaseous product that is allowed to escape.

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