- any salt or ester of hypophosphoric acid
WordReference Random House Unabridged Dictionary of American English © 2026
hy•po•phos•phate
(hī′pə fos′fāt),USA pronunciation n.
- Chemistrya salt or ester of hypophosphoric acid.
- hypophosphor(ic acid) + -ate2 1860–65
Collins Concise English Dictionary © HarperCollins Publishers::
hypophosphate /ˌhaɪpəˈfɒsfeɪt/ n