Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Having two hydrogen ions to donate to bases in an acid-base reaction.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Tending to donate two hydrogen ions (H+) in solution.

Etymologies

di-1 + prot(on) + -ic.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From di- ("two") + protic ("containing a hydrogen ion") (Wiktionary)

Examples

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