au·to·troph 
(ôtə-trŏf′, -trōf′)
(ôtə-trŏf′, -trōf′)n.
An organism capable of synthesizing its own food from inorganic substances, using light or chemical energy. Green plants, algae, and certain bacteria are autotrophs.
au′to·trophic adj.
au′to·trophi·cal·ly adv.
au·totro·phy (ô-tŏtrə-fē) n.