zwitterion /zwit·ter·ion/ (tsvit´er-i″on) an ion that has both positive and negative regions of charge.
zwitterion
ion [i´on]
zwit·ter·i·on (zw t  r-  n, swt-, tsvt-)n. See dipolar ion. zwit ter·i·onic (-- nk) adj. |
zwitterion
[tsvit′ərī′ən]
a molecule that has regions of both negative and positive charge. Amino acids such as glycine are almost always present as zwitterions when in neutral solutions. Also called dipolar ion.
ion [i´on]
an atom or group of atoms having a positive (cation) or negative (anion) electric charge by virtue of having gained or lost an electron; substances forming ions are called electrolytes. adj., adj ion´ic.
dipolar ion an ion that has both positive and negative regions of charge.
hydrogen ion the positively charged hydrogen atom (H+), which is the positive ion of all acids. See also hydrogen ion concentration.
hydroxyl ion the negatively charged group, OH−, present to excess in alkaline solutions.
zwitterion
an ion that has both positive and negative regions of charge. Called also dipolar ion.
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