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.

Subject:

a graph showing the runoff of a river in relation to discharge and time after the rain

a halogen atom (F, Cl, Br or I) reacts by addition reaction with alkenes

Subject:

(also called a water cycle) the cycle of evaporation and condensation that controls the...

Subject:

water sources dry up and there is less underground water

the molecule is split by the addition of a water molecule

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