In this article, a completely new term for the science of linguistics - meronym and its features within the language level is discussed. A meronym is a small lexical part of a linguistic unit, which represents a part of a whole. This term, in contrast to the lexical properties of antonyms, synonyms, homonyms, and paronyms, which are known in the field of linguistics, is a product of development that proves the possibility of development in the field and shows the uniqueness of inter-word relations which can perform lexical, semantic, and syntactic functions.