polyproticadj.
/ˌpɒlɪˈprəʊtɪk/, U.S. /ˌpɑliˈproʊdɪk/ Chemistry.
Of an acid: capable of donating more than one proton to a base; polybasic. Also occasionally: (of a base) capable of accepting more than one proton from an acid.
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the world > matter > chemistry > chemical substances > acids > [adjective] > relating to acids general > proton donating power
tribasic1837
monobasic1842
tetrabasic1863
polyprotic1944
1944 J. A. Timm Gen. Chem. xxxii. 343 Acids whose molecules may donate more than one proton are called polyprotic acids.
1968 J. G. Morris Biologist's Physical Chem. v. 114 In biological media we frequently encounter polyprotic, weak acids (e.g. carbonic, phosphoric, citric acids), whose complete neutralization requires the addition of two or more equivalents of sodium hydroxide.
1969 H. T. Evans tr. G. Hägg Gen. & Inorg. Chem. xii. 316 Acids and bases that can give up or take up more than one proton are called polyvalent..or polyprotic.
1989 Nature 30 Mar. 410/1 This type of behaviour has been observed and has been attributed to protonation of adjacent functional groups of polyprotic organic acids.
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
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adj.1944