Photosynthesis:The process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll pigments.
Chlorophyll:A green pigment, present in all green plants and in cyanobacteria, responsible for the absorption of light to provide energy for photosynthesis.
Thylakoid: A membrane-bound compartment inside chloroplasts and cyanobacteria. They are the site of the light-dependent reactions of photosynthesis.