adj :  being or occurring at the middle place, stage, or degree or between extremes <possible that an RNA-DNA hybrid strand is formed which may then change to duplex DNA -C. P. Haskins> 
, n :  one that is intermediate : esp  :  a chemical compound synthesized from simpler compounds and usu. intended to be used in later syntheses of more complex products <pharmaceutical s>  .
 
 
 
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