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Any of a group of viruses that contain single-stranded RNA and cause cancers in birds and mammals.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
1. Oncogenic RNA virus.
2. Retrovirus, see there.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.