pho·to·syn·the·sis 
(fō′tō-sĭnthĭ-sĭs)
(fō′tō-sĭnthĭ-sĭs)n.
The process in green plants and certain other organisms by which carbohydrates are synthesized from carbon dioxide and a source of hydrogen (usually water), using light as an energy source. Most forms of photosynthesis release oxygen as a byproduct.
pho′to·syn·thetic (-sĭn-thĕtĭk) adj.
pho′to·syn·theti·cal·ly adv.
photosynthesisA. sunlight is absorbed by chlorophyll in a leaf
B. carbon dioxide is taken in from the air
C. water is transported from the roots
D. glucose is synthesized and distributed throughout the plant
E. oxygen is released