The third item in a series or system of classification, A proposed unit of magnetic intensity, equal to one hundred thousandth of a gilbert per second, a unit of magnetic field strength equal to one-hundred-thousandth of an oersted, adjective_ Being in the third position relative to a designated carbon atom in an organic molecule at which an atom or a group may be substituted, Referring to the third of a group of isomers, or molecules of similar origin or properties, determined arbitrarily by those who discover or classify them Used in combination