The term specific character as a specialized sign of language and science is considered in the article.The term is a unit of cognition and simultaneously serves as a unit of nomination of its results.The author advances an idea that, representing a special notion by means of Dresses a language sign, the term becomes cognitive semiotic instrument of cognition.The author of the article states that the definition Whiskey Glass And Wine Glass Set is an essential characteristic of the term playing an important role in singling out terminological lexis from the word stock of a language.Multidimensional characteristic and derivational complexity of a scientific term is exposed in the article.