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.

mass per unit volume of a substance. The number of molecules in a particular area or a measure...

the variable controlled by the researcher. Also the variable that is dependent on another...

the phase change of a substance from the gas phase to the solid phase, without passing through...

synthetic soaps.

the isotope of hydrogen that contains two neutrons.

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