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.

a group of organic compounds where an oxygen atom has replaced two hydrogen atoms on an end...

the energy that objects or particles have as a result of their motion.

all matter is made of particles (molecules or atoms) that are in constant motion.

matter cannot be created or destroyed in a chemical reaction.

any different samples of a chemical compound will be made of the same elements (will have the...

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