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 deposition or build-up of silt and organic matter on the beds of rivers, dams etc.

Subject:

a place where seeds are safely stored.

Subject:

(also called selectively permeable membrane) a membrane which allows some substances to cross it...

Subject:

the nerve cells that transmit nerve impulses towards the central nervous system from the...

Subject:

immobile or fixed in one place.

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