amphoteric

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amphoteric

 [am″fo-ter´ik]
capable of acting as both an acid and a base; capable of neutralizing either bases or acids.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

am·pho·ter·ic

(am'fō-tār'ik),
Having two opposite characteristics, especially having the capacity of reacting as either an acid or a base; for example, Al(OH)3 Ξ H3AlO3 or an amino acid.
[G. amphoteroi (pl.), both, fr. amphō, both]
Farlex Partner Medical Dictionary © Farlex 2012

am·pho·ter·ic

(am-fŏ-ter'ik)
Having two opposite characteristics, especially having the capacity of reacting as either an acid or a base.
[G. amphoteroi (pl.), both, fr. amphō, both]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

amphoteric

(of chemicals) capable of acting either as bases or acids. Amino acids and some metal oxides (such as zinc) are amphoteric. The amphoteric nature of amino acids is important to the structure and function of proteins which are made from them. In addition, it affects the separation of amino acids by ELECTROPHORESIS.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005