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The Collaborative International Dictionary of English v.0.48 (gcide)

autotroph \autotroph\ n.
an organism which is {autotrophic}, i. e., an organism (such
as most plants and certain microorganisms) which are capable
of synthesizing its own food from simple organic substances,
requiring only minerals as nutrients for growth, and using
carbonate or carbon dioxide as a source of carbon and simple
inorganic nitrogen as a nitrogen source; the energy required
is derived from photosynthesis or chemosynthesis. Opposed to
{heterotroph}. See also {auxotroph}.

Syn: autophyte, autophytic plant, autotrophic organism.
[WordNet 1.5 PJC]

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