reverse transcriptase

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A polymerase that catalyzes the formation of DNA on an RNA template, found in oncogenic viruses containing RNA, especially the retroviruses.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun biochemistry A polymerase that catalyzes the formation of DNA from RNA; found in retroviruses.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a polymerase that catalyzes the formation of DNA using RNA as a template; found especially in retroviruses