{ I"so- (?), Is- (?). } [Gr.
'i`sos equal.] A prefix or combining form, indicating identity, or equality; the same numerical value; as in isopod, isomorphous, isochromatic.
Specif.: (a) (Chem.) Applied
to certain compounds having the same composition but different properties; as in isocyanic. (b) (Organic Chem.)
Applied to compounds of certain isomeric series in whose structure one carbon atom, at least, is connected with three other carbon atoms; --
contrasted with neo- and normal; as in isoparaffine; isopentane.
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