amphiprotic (solvent)

https://dx.doi.org/10.1351/goldbook.A00304
Self-ionizing solvent possessing both characteristics of Brønsted acids and bases, for example H2O and CH3OH, in contrast to aprotic solvent.
Source:
PAC, 1994, 66, 1077 (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1083