- any organism that uses light as its principal source of energy.
Origin of phototroph
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- an organism that obtains energy from sunlight for the synthesis of organic compounds
- An organism that manufactures its own food from inorganic substances using light for energy. Green plants, certain algae, and photosynthetic bacteria are phototrophs. Also called photoautotroph
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