[foh-toh-aw-tuh-trof, -trohf]
noun Biology.
any organism that derives its energy for food synthesis from light and is capable of using carbon dioxide as its principal source of carbon.

1945–50; photo- + autotroph

photoautotrophic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
photoautotrophic (ˌfəʊtəʊˌɔːtəʊˈtrɒfɪk)
See also photosynthesis (of plants) capable of using light as the energy source in the synthesis of food from inorganic matter

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
photoautotroph   (fō'tō-ô'tə-trŏf', -trōf')  Pronunciation Key 
See phototroph.
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