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
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
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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