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retrorocket
retrorse
retrospect
retrospective
retrosynthetic
retrotransposon
retroussé
retroversion
retrovirus
retry
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Rett syndrome
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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
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