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:

the cartilaginous flap at the top of the mammalian trachea, which closes off the entrance to the...

Subject:

tissue that covers the surfaces of the body (the skin) and lines the ducts of the gut.

Subject:

epithelial tissue that lines the inner spaces of the body or organs.

era
Subject:

a very long time span in the Earth's history, covering tens or hundreds of millions of years....

Subject:

a large oxygen-carrying protein (blood pigment).

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