Autotroph



any organism capable of self-nourishment by using inorganic materials as a source of nutrients and using photosynthesis or chemosynthesis as a source of energy, as most plants and certain bacteria and protists.

autotroph au·to·troph (ô’tə-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·troph’ic (-trŏf’ĭk, -trō’fĭk) adj.
autotroph
(ô’tə-trŏf’)
An organism that manufactures its own food from inorganic substances, such as carbon dioxide and ammonia. Most autotrophs, such as green plants, certain algae, and photosynthetic bacteria, use light for energy. Some autotrophs, such as chemosynthetic bacteria, obtain their energy from inorganic compounds such as hydrogen sulfide by combining them with oxygen. Compare heterotroph.

autotrophic adjective (ô’tə-trŏf’ĭk, -trō’fĭk)

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