Amphoteric Definition

ămfə-tĕrĭk

adjective

Having the characteristics of an acid and a base and capable of reacting chemically either as an acid or a base.

American Heritage

Having both acid and basic properties.

Webster's New World

(chemistry) Having the characteristics of both an acid and a base, and capable of reacting as either; amphiprotic.

Wiktionary

Synonyms:

Antonyms:

other

Capable of reacting chemically as either an acid or a base. Water, ammonia, and the hydroxides of certain metals are amphoteric.

American Heritage Science

Origin of Amphoteric

From Ancient Greek ἀμφότερος (amphoteros, “each of two”), from ἄμφω (amphō, “both”).

From Wiktionary
From Greek amphoteros each of two from amphō both

From American Heritage Dictionary of the English Language, 5th Edition

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