Sentence:  <WSD>Autology</WSD>, the reflexive "naming" or "mention" of an expression, differs qualitatively from other modes of reference in which expressions are "used." This, however, does not mean that <WSD>autology</WSD> is marginalized as a form of "metalinguistic" discourse, restricted to language about language. <WSD>Autology</WSD> is unique to language: it is not found in nonhuman semiotic systems. 
Meaning of the word marked with <WSD> tags:  (grammar) The property of a word or phrase which describes itself.