polyphosphoric acid

English Thesaurus

1. a series of oxyacids of phosphorus (noun.substance)

hypernym	:	oxyacid, oxygen acid,
definition	:	any acid that contains oxygen (noun.substance)

hyponym	:	metaphosphoric acid,
definition	:	a glassy solid acid ([HPO3]n) often used as a dehydrating agent (noun.substance)

hyponym	:	pyrophosphoric acid,
definition	:	a solid acid formed by reactions of orthophosphoric acid (noun.substance)