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.

an electrochemical cell has two half-cells: one is where oxidation takes place and the other...

the time required for half the atoms present in an object have undergone radioactive decay and...

ions formed from the halogens, for example Cl-

Subject:

a vision or sensation which seems real but is imaginary.

Subject:

a drug that causes hallucinations.

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