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WordReference Random House Unabridged Dictionary of American English © 2024au•to•troph (ô′tə trof′, -trōf′),USA pronunciation n. [Biol.]- Biology, Ecologyany 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. Cf. heterotroph.
- 1935–40; back formation from autotrophic; see auto-1, trophic
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