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phosphoric acid

phos·phor·ic ac·id


noun 
Definition:
 
1. transparent solid used as fertilizer: a water-soluble transparent solid acid. Use: fertilizer, rust-proofing, in soft drinks, pharmaceuticals, animal feeds. H3PO4

2. acid formed from phosphorus pentoxide: an acid of a group formed by the combination of phosphorus pentoxide with water, each acid having one more oxygen atom than the corresponding phosphorous acid

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