polyprotic

poly- +‎ protic

polyprotic (comparative more polyprotic, superlative most polyprotic)

1. (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.

• polytropic