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.

the transfer of heat or energy from areas of higher temperatures to areas of lower temperatures...

a substance that allows heat or energy transfer.

Subject:

zone of greatest heat, where the sun's rays are overhead

a substance that does not allow heat or energy transfer.

Subject:

the discharge of heated water directly into rivers, lakes or the sea, usually from power plants...

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