Definition of "orthophosphate" [orthophosphate]

• Any salt or ester of orthophosphoric acid; an ordinary phosphate (noun)

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• "That's because in June 2004 the Washington Aqueduct started adding a chemical called orthophosphate to the water."
• "By January 2006, the orthophosphate treatment had brought the city into compliance."
• "Part of the dissolved aluminum can subsequently settle in the sediments of atmospherically acidified lakes and reservoirs, reducing orthophosphate availability and disrupting the phosphorus cycling in those water bodies."