- capable of functioning either as an acid or as a base.
- chem able to function as either a base or an acidAlso: amphiprotic
“neither acid nor alkaline,” 1832, from Greek amphoteros “each or both of two,” variant of amphi-.
- Having the capacity to react as either an acid or a base.
- Capable of reacting chemically as either an acid or a base. Water, ammonia, and the hydroxides of certain metals are amphoteric.