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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.


Here are some examples of the kinds of definitions you’ll find on this page.


a value towards which a sequence or series tends; or a position towards which a line moves.


the liability of an investor or shareholder is limited to the amount of money invested in the...


owner is not responsible for the debts of the company.

the reactant that is completely consumed and determines how much product can be formed.

if one reactant is available in excess, the other reactant will be the limiting reagent, because...