Is- — See Iso-.
Is- — A prefix or combining form, indicating identity, or equality; the same numerical value; as in isopod, isomorphous, isochromatic.
Is- — Applied to certain compounds having the same composition but different properties; as in isocyanic.
Is- — 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.
These Also :