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WordReference Random House Learner's Dictionary of American English © 2024pho•to•syn•the•sis /ˌfoʊtəˈsɪnθəsɪs/USA pronunciation n. [uncountable]- Biochemistrythe production of organic materials from carbon dioxide and water, using sunlight as energy with the aid of chlorophyll.
See -thes-. WordReference Random House Unabridged Dictionary of American English © 2024pho•to•syn•the•sis (fō′tə sin′thə sis),USA pronunciation n. [Biol., Biochem.]- Biochemistry(esp. in plants) the synthesis of complex organic materials, esp. carbohydrates, from carbon dioxide, water, and inorganic salts, using sunlight as the source of energy and with the aid of chlorophyll and associated pigments.
- 1895–1900; photo- + synthesis
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