 On the other hand, the two uses of "peel" are associated with two different lexemes, one being a noun and the other a verb.Linguists have been unwilling to apply the label polysemy to such cases since polysemy is traditionally considered to be a relation between different uses of the same lexeme, and thus not applicable to words belonging to different categories.The term heterosemy was first introduced by Gunnar Persson, but is usually associated with the work of Frantisek Lichtenberk.