- (chemistry) Of an acid (or a base) that can donate (or accept) more than one proton; polybasic
1946, Alexander Smith, Smith's College Chemistry, page 267:
- Many acids, however, are able to furnish more than one proton per molecule; these are known as polyprotic acids.
2011, Steven S. Zumdahl, Chemistry: An Atoms First Approach:
- Some important acids, such as sulfuric acid (H2SO4) and phosphoric acid (H3PO4) can furnish more than one proton and are called polyprotic acids.
2012, Daniel C. Harris, Exploring Chemical Analysis, page 233:
- Carbonic acid from CO2 and amino acids from proteins are examples of polyprotic acids—those having more than one acidic proton.
able to donate more than one proton