In the United States, polytechnic is the former name for a school, college, or university which specialized in courses in science and technology
In Britain, a polytechnic was a college where you could go after leaving school in order to study academic subjects up to degree level, or to train for particular jobs. In 1992, all the polytechnics in Britain became universities
Comprehending, or relating to, many arts and sciences; applied particularly to schools in which many branches of art and science are taught with especial reference to their practical application; also to exhibitions of machinery and industrial products