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photosynthesis
noun
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Divide photosynthesis into syllables:

pho · to · syn · the · sis

How to pronounce photosynthesis:

Definition of photosynthesis:

photosynthesis (noun):
synthesis of compounds with the aid of radiant energy (especially in plants).
synthesis of chemical compounds with the aid of radiant energy and especially light
formation of carbohydrates from carbon dioxide and a source of hydrogen (such as water) in the chlorophyll-containing cells (as of green plants) exposed to light

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