During the 1930's, what term did the nazis use to justify censorship of the arts?

The Nazis used the term"degenerate" to disparage any form of art that was considered un-German. 

Details:
To consolidate power and to build up their idea of national and racial purity, the Nazi regime referred to any "non-German" form of modern art as degenerate. One way to label unacceptable art was to refer to it a Jewish or communist, with the intention to inflame public opinion against it.

Those considered to be degenerate artists were subjected to sanctions, forbidden to sell their art and to produce art.

Many writings by renowned authors were burned. Some of these authors include Ernst Bloch, Albert Einstein, Sigmund Freud, Victor Hugo, Ernest Hemingway, Helen Keller, H.G. Wells, and many others.