where a double-stranded cDNA molecule
(or dscDNA) is inserted into a cloning vector
(another DNA molecule
which will continue to be capable of replication
after insertion of foreign material), so that the gene
encoded by the cDNA can be expressed (transcribed and used) or so many copies of the gene
can be made.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.