Also found in: Medical, Encyclopedia, Wikipedia.
An organism that is capable of using light energy to synthesize sugars and other organic molecules from carbon dioxide. Green plants, algae, and cyanobacteria are phototrophs. Also called photoautotroph.
(Biology) an organism that obtains energy from sunlight for the synthesis of organic compounds
pho•to•troph(ˈfoʊ təˌtrɒf, -ˌtroʊf)
any organism that uses light as its principal source of energy.