crassulacean acid metabolism
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crassulacean acid metabolism[‚kras·ə¦lā·shən ¦as·əd mə′tab·ə‚liz·əm]
A type of photosynthesis exhibited by many succulent plants in which carbon dioxide is taken up and stored during the night to allow the stomata to remain closed during the daytime, decreasing water loss. Abbreviated CAM.