Polyprotic acids, also known as polybasic acids, are able to donate more than one proton per acid molecule, in contrast to monoprotic acids that only donate one proton per molecule.
pˌɑːlɪpɹˈɑːɾɪk ˈæsɪdz, ˈɔːlsoʊ nˈoʊn æz pˌɑːlɪbˈeɪsɪk ˈæsɪdz, ɑːɹ ˈeɪbəl tə doʊnˈeɪt mˈoːɹ ðɐn wˈʌn pɹˈoʊtɑːn pɜːɹ ˈæsɪd mˈɑːlɪkjˌuːl, ɪn kˈɑːntɹæst tə mˌɑːnoʊpɹˈɑːɾɪk ˈæsɪdz ðæt ˈoʊnli doʊnˈeɪt wˈʌn pɹˈoʊtɑːn pɜː mˈɑːlɪkjˌuːl.