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 cavity used for transport purposes. It has one opening to the environment through which...

Subject:

the complete set of alleles (different forms of genes) making up the genetic material of a...

Subject:

when the entire heart, both of the atria and ventricles, is relaxed.

Subject:

small units of DNA that contain hereditary information that is passed from one generation to the...

Subject:

refers to any variation in the nucleotides, genes, chromosomes, or whole genomes of organisms....

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