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1.
Any of a group of green pigments that are found in the chloroplasts of plants and in other photosynthetic organisms such as cyanobacteria, especially:
A waxy blue-black microcrystalline green-plant pigment, C55H72MgN4O5, with a characteristic blue-green alcohol solution. Also called chlorophyll a.
A similar green-plant pigment, C55H70MgN4O6, having a brilliant green alcohol solution. Also called chlorophyll b.
Chlorophyll
by zacharias kanuk April 06, 2003
 
2.
a tetrapyrrole similar to heme but with a reduced ring and a long phytol chain esterified on to a carboxylic acid side chain. Falls into the class of organic chemicals called polyenes, which have alternating networks of single and double bonds.
that's chlorophyll a in the chloroplast
by george miller January 22, 2005