Lexis in one of the most important elements to be considered when discussing English language teaching as the many intricacies and subtleties forming up vocabulary can constitute an important barrier in front of effective and correct acquisition. It has often been pointed out that a major obstacle to comprehending texts in their disciplines for technical students of  English is technical vocabulary as it would be expected (highly specialized words usually used only by specialists and which are as a rule taken care of by the subject teachers),or general vocabulary which is usually acquired by the time students reach college, but a third intermediate lexical proportion of scientific and technological texts and known as sub-technical, semi-technical or nontechnical vocabulary.

Chung, T.M. Identifying technical vocabulary. Reading in a Foreign Language 2,2003. p. 193.

Chung, T.M., Nation, I.S.P. Technical vocabulary in specialized texts. Reading in a Foreign Language 15 (2), 2003.pp.103-116.

Crandall, J (Ed.). ESL through content-area instruction; Mathematics, science, social studies. Englewood Cliffs; Prentice Hall Regents,1987.

Nagy, W., Anderson, R How many words are there in printed school English? Reading Research Quarterly 19, 1984. p.304.

Gamper, H., Stock, O. Corpus-based terminology. Terminology 5,1999. pp.147-159.

In the present article some methods of teaching English technical terms to the higher school students and some techniques of translation of technical terms are viewed.

Technical term, typology, frequency, approach, process, reliability.