chlorophyll a

Noun

 * 1) The universal chlorophyll (C55H72MgN4O5) essential to the dominant oxygenic photosynthesis I process, present in all eukaryotes, cyanobacteria, chromists, and prochlorophytes that photosynthesize, and that contributes to the observed green color of these organisms.

Coordinate terms

 * chlorophyll b (especially in shade-adpated plants and green algae), chlorophyll c (brown algae, diatoms), chlorophyll c1, chlorophyll c2, chlorophyll d (cyanobacteria, red algae), chlorophyll f (stromatolites)