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.

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

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

Subject:

the law that states that if a × b = 0, then a = 0 or b = 0,...

Subject:

the quantity of a fraction that is written above the fraction line.

Subject:

a chemical substance found in food that is essential for maintaining life.

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