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:

a perforated wall or part of a wall at the end of one of the individual cells making up a sieve...

Subject:

thin-walled or slightly strengthened, elongated phloem cells that conduct food substances.

Subject:

epithelial tissue consisting of a single layer of cells.

Subject:

tissue consisting of only one type of cell.

Subject:

a small body of modified cardiac muscle cells in the upper right corner of the wall of the right...

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