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.
Here are some examples of the kinds of definitions you’ll find on this page.
a temporary unstable high energy composition of atoms representing a transition step between the...
the energy required to break the bonds of the reactants and start a reaction.
the process whereby a mixture of two or more different monomers react to form a polymer.
reactions in which two or more molecules react to form one molecule.