From Biology-Online Dictionary | Biology-Online Dictionary


noun, plural: chlorophylls

The green pigment found in the chloroplasts of higher plants and in cells of photosynthetic microorganisms (e.g. photosynthetic bacteria), which is primarily involved in absorbing light energy for photosynthesis.


The chlorophyll best absorbs light in the blue and red while poor in the green portion of the electromagnetic spectrum.

The chlorophyll is a chlorin pigment with magnesium at the center of the chlorin ring. There are about five closely related chlorophylls:

Word origin: Greek chloros (green) and phyllon (leaf).

Also called: green pigment

Compare: carotenoid