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retroactive inhibition
retrocede
retrochoir
retrofire
retrofit
retroflection
retroflex
retroflexion
retrograde
retrogress
retrogression
retrolental
retronym
retropack
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retrorocket
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retrovirus
ret·ro·vi·rus [ rèttrō vrəss, réttrə vrəss ] (plural ret·ro·vi·rus·es)


noun 
Definition:
 
virus with genetic information in RNA: a virus whose genetic information is contained in RNA rather than DNA. Some retroviruses cause AIDS and cancer and they contain the enzyme reverse transcriptase for generating DNA from RNA.

ret·ro·vi·ral [ rèttrō vrəl ] adjective
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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