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phosphine
phosphite
phospho-
phosphocreatine
phosphofructokinase
phosphoglucomutase
phospholipase
phospholipid
phosphonic acid
phosphonium
phosphor
phosphor bronze
phosphorate
phosphoresce
phosphorescence
phosphoric
phosphoric acid
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phosphoryl

phos·pho·ryl [ fósfəril ] (plural phos·pho·ryls)


noun 
Definition:
 
trivalent chemical group: a chemical group, usually with a valence of three, consisting of one phosphorus atom and one oxygen atom

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