pho·to·au·to·troph (f  t-ô t -tr f, -trf)n. An organism capable of synthesizing its own food from inorganic substances using light as an energy source. Green plants and photosynthetic bacteria are photoautotrophs. pho to·auto·trophic adj.pho to·auto·trophi·cal·ly adv. |
| photoautotroph (ft-ôt-trf, -trf) See phototroph. |
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