3 definitions by devmodesquad

Top Definition
A molecule that has >1 localized charges which may be of opposite polarity. That is to say, it may be a positive ion on one side, and a negative ion on the other.
Most free amino acids form zwitterions, and in this way the negative and positive ends join together to form a chain. When these chains reach a length of thousands of links they become proteins.
by devmodesquad January 10, 2008

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The determinative factor in a decision or question, especially in law.
Whether he blew a .08 or higher on the breathalyzer is dispositive as to whether he will be found guilty of DUI.
by devmodesquad November 20, 2010

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ion
An atom or molecule with an unequal number of protons and electrons, yielding a charge.
When salt is added to water it dissolves by breaking into it's conjugate ions.
by devmodesquad January 10, 2008

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