Glossary

Select a subject
Search for a definition...
Back to the Glossary
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
R
S
T
U
V
W
X
Y
Z

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 tough substance made from a modified polysaccharide that contains nitrogen. It is the main...

Subject:

parenchyma cells that are exposed to light and contain many chloroplasts. Chlorenchyma cells...

Subject:

chemicals used as the propellants in aerosol sprays, as coolants in fridges, air conditioners...

Subject:

a green pigment in plants, which is needed for photosynthesis.

Subject:

organelles that only occur in the green parts of plants. They contain the green pigment...

Pages