| ̷ ̷ ̷ ̷ at meta- + noun
Etymology: International Scientific Vocabulary metaphosph- (from metaphosphoric acid ) + -ate
1. : a salt or ester of a metaphosphoric acid — see sodium metaphosphate , tetrametaphosphate , trimetaphosphate
2. : any of various usually glassy phosphates approximating a metaphosphate in composition — see sodium phosphate glass