sodium metaphosphate

noun

1

: any of several crystalline sodium salts NaPO₃ or (NaPO₃)_n of a metaphosphoric acid: such as

a

: the water-soluble cyclic trimetaphosphate (NaPO₃)₃ or NaPO₃ I

b

: sodium Kurrol's salt NaPO₃ IV

2

a

: a water-soluble sodium phosphate glass having the composition of a sodium metaphosphate

called also sodium (1:1) phosphate

compare sodium hexametaphosphate

b

: sodium phosphate glass

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