history of lexical and linguistic studies in the arab renaissance

since the end of the nineteenth and twentieth century , the concept of the nature of the language and its function and studied were in change. that changes caused prosecution efforts which made by the western scientists to study most of the world language descriptively and historically ,comparely . khalil is the first who authored the lexicon in arabic language, and who compiled a perfect lexicon between the whole languages in the world. for lexicons is important role in transmission of culture , science and meanings from one generation to another. the methods of the lexicons are in two kinds: meaning method , termic method. scientists of the language in europe and america constructed a new study in linguistics.