Linguistics is a scientific study of languages: General linguistics-establish the general principles for the study of language and to determine the characteristic of human language as a phenomenon. Special linguistics-studies a particular language system Contrastive linguistics-focuses on the differences between languages Comparative linguistics-primarly identifies the common characteristics of defferent languages Branches -phonetics and phonology -lexicology -grammar (morphology and syntax) -semantics -pragmatics The object of lexicology Lexicon-greek word Logos science Lexicology is a branch of linguistics which studies the vocabulary of a language. Its mean subject is the word,its morphemic structure,history and meaning. Although lexicology deals with both formed and semantic aspects of words also called lexeme A morpheme is the minimal unit in the structure of words. Morphology studies the structure of words or the shape of something strictly linguistic. Morphology is the study of structure and form including inflection,derivation and the formation of compounds. At the basic level words are made of morphemes